50 HzM-7 Technical Service Manual
Contents
1. BLUE Neutral GREEN YELLOW Ground O2 e BROWN Hot BLUE Neutral Elite System In Spa System Box 290900999 BROWN Hot BLUE Neutral GREEN YELLOW Ground YELLOW Ground 10 X 800 645 3201 Basic Control System Troubleshooting Low Voltage At Balboa it s been our experience that the majority of the problems associated with electronic control systems are due to low voltage Brown outs Brown outs can have an effect on the spa s operation in a variety of ways The control panel may go blank have scrambled messages on the LCD or only a few features will function Ifthe system is getting the proper voltage at TB1 but still does not operate then test for a blown power input fuse If the system you are troubleshooting is a Prestige 2000LE M 7 or Value M 7 System the power input fuses snap directly to the circuit board Checking the System Power Input Fuse A Warning These procedures are performed while the system is powered up and running under peak loads Be careful Value M 7 and 2000LE M 7 Systems If your system uses 230V peripheral devices Measure between the brown TB1 terminal and F5 power input fuse on the side farthest away from the circuit board edge opposite the F5 silkscreen You should see 230 volts Ifthe system is equipped with the additional F6 p2. positions on the printed circuit board DOJ Open J umper 0 0 Closed umper o XA Selectable Function J umper 36 J 7 J 16 J 25 J 10 J 6 Fr bi pa II ait E E NOTE The Elite can also be equipped with the Standard Digital 6 button top side panel Part Number 54157 supporting one pump or the Standard Digital 7 button top side panel Part Number 54156 supporting two pumps 28 X 800 645 3201 Value M 7 TUV Circuit Board 1 2 SEO Se 11 12 13 14 mam itmi JG Circuit Board Components AJC Input a on fuses a F6 25 b F5 PA Inboard fuse F4 Spa and fiber optic light fuse 3A 250V F1 Onboard blower fuse F7 Transformer input Control panel input duplex panel 10 position dip switch modes of operation see chart Aux freeze protection circuit J22 optional a Sensor A connection b Sensor B connection U4 main processor Pump 1 low relay K1 Pump 1 low output J29 Pump 1 hi relay K6 15 16 17 18 29 20 21 22 23 24 25 26 J43 Pump 1 hi output J28 Ozone relay K7 Ozone output J14 tea VAC jumper option for spa light or fiber optic light J56 57 Spa light and fiber optic light relay K5 Spa light output onl aP 77 tp y b J4 Heater relay K2 Heater output A and B High limit relays A and B Serial Number Model Number Designation Blower Blower output J19 Reset persistent memory to defau
3. during power up until Pr is displayed Must be on 1 pin otherwise for persistent memory to work 2000LE M 7 S Mode of Operation On Off S10 30 50 Amp 30A 50A S9 1 or 2 Pumps 1 Pump 2 Pumps S8 Deg C F C FP S7 Pump 1spd 2spd Ispod 2spd S6 50 60 HZ 50HZ 60HZ S5 Pump1 1spd 2spd in Circ 1spd 2spd S4 NA Must be off NA NA 83 Circ Non Circ Circ Non Circ S2 FO Spa Light FO Spa Light Sl Test Mode On Off Jumper J43 is persistent memory reset Reset persistent memory to default by putting J43 on 2 pins during power up until Pr is displayed Must be on 1 pin otherwise for persistent memory to work A Important Dip Switches must be pushed entirely to one side to register on or off 26 X 800 645 3201 Dip Switch and Jumper Settings J umper orientation and configuration 0 Logic J umper Es Feature Off J umper on one pin Feature On Jumper on two pins E Feature A Enabled Feature B Enabled TON A a SORES att Peeper Um aL me ott i METERINEZE T REI a wel The printed circuit boards especially of the Flite System utilize jumpers that control the operation of the Power System depending upon the model of the system and the top side control panel being used The jumpers are identified on the board with the letter J followed by a number These jumpers are positioned at the time of manufacture for specific system configuratio
4. 8 Remote Panel Troubleshooting 005 17 R C D Line in Voltage Check DOWN Dedicated hasas paia a pasa tasas 8 R CD Load Out Voltage Check 00 00 9 Panel Messages 230 V Dedicated Taiteet pers e pao 9 System Box Check at TB1 spas pesei prenda es 9 i ne DONO gure a No ess tp NS ep ee 230V Dedicated ras spina Tinan aa 9 SA SNA SNH OTe tbe eight 18 Peak Load Check cenas Ea SS aa 9 SB SNBSNT 1 18 Peak Load Check for 230 V Dedicated 9 SN SNS r READ A SE 18 Wiring S amp hematic srs qi ev ea ey aed ide 10 CID Fu We nos ye tre Sy et SD NU 19 Basic Control System Troubleshooting EE ORA dn NS A E Low OB speed era 11 ere Er o Ee a Brown OulS 1 esse eves eee eee ene 11 Testing the Sensor Set aaao 20 Checking the System Power Input Fuse 11 E DRE hp eros aod Mehl UN 20 Value M 7 System precast Seed oh ey alada 11 1D PE EANET E 21 2000LE M 7 System era seta rdias 11 TY AE E EE E EATE CATETE 21 Flite System eee eee keene eee aa 11 Some Troubleshooting Scenarios 0 0e ee 21 2 800 645 3201 Table of Contents cont R C D Troubleshooting If Correct Wiring is Verified 0 eee To Disconnect the Heater 0005 Testing the Circuit Board Output To Use the Balboa Quick Check 0 Changing a System Circuit Board How to Remove a System Circuit Board How to Replace a System Circuit Board Spa Behavior General Inform
5. If there is no intermittent failure no further analysis is required Turn off the power and replace the transformer After installing your test transformer intermittent symptoms may still occur during the test If so replace the circuit board see page 24 and install the original transformer A Important Be sure to turn the power off before replacing any component especially a circuit board wwwobalboa instruments com Power Up Pump Priming and Software ID Before applying voltage to the System it is very important that you understand the sequence of events that occur when power is applied so that the pumps can be primed efficiently and faults created by no water flow can be prevented Please review the following procedures and power up events before applying voltage to the System 1 Check the voltage at the main power panel to be sure that you have the correct voltage for the System being used Also be sure that the voltage is within or 10 of the mean voltage For 230 V it should be between 207 Vand 253 V 2 Test and reset the R C D If it does not operate properly do not apply voltage to the System until the problem has been corrected 3 Fill the spa to its correct operating level Be sure to open all valves in the plumbing system before filling to allow as much air as possible to escape from the plumbing and the heater during the filling process 4 Vent air from the pump s Do this by loosen
6. Jumper J55 Misc 3 Jumper J58 M 7 Test Mode High Limit Relay K6 K7 Heater Relay K8 wwwobalboa instruments com 31 Copyright 2001 Balboa Instruments Inc P NDM918 02 02
7. Priming Mode by pressing the Temp Warm or Cool buttons allows up to 6 minutes available before the first filter runs IMPORTANT INFORMATION If the filter settings have just been changed it may take up to 24 hours for the filter cycle to reflect the changes This is especially likely when changing from a very long filter duration such as Continuous to a short one or vice versa The low speed pump on non circ and ozone generator if installed will run during the filter cycles The blower runs for 30 seconds at the start of each filter cycle This will maintain water quality in the air channel The pumps other than pump 1 in non circ including pump 1 in circ will run for 5 minutes at the start of each filter cycle Heater Startup Information On M 7 systems the heater goes through a testing phase every time it starts up to assure that there is adequate water flow This provides sophisticated dry fire and low flow protection It can be confusing if you don t know what to expect Step by step here is what happens Note that the timing temperature details may be slightly different on some older M7 systems Prior to heating the pump is run for at least two minutes and then the temperature difference between the sensors is assessed It must be 2 F 1 0 C or less for heating to proceed otherwise an error is issued The heater turns on for 6 5 to 18 seconds depending on heater voltage and wa
8. This mode will automatically last for about 4 minutes or you can manually exit the priming mode after the pump s have primed Manually exiting the priming mode is described later in this text Regardless of whether the priming mode is automatically terminated or you manually exit the priming mode the system will automatically return to the normal heating and filtering mode at the end of the priming mode Pump Priming As soon as Pr is indicated on the top side panel push all Jet buttons to start the pumps On models with a combined Jet button push it until all pumps are on high speed All pumps need to be running in the high speed mode to facilitate priming If the pumps have not primed after 2 minutes and water is not flowing from the jets in the spa do not allow the pumps to continue to run Turn the power off at the main power panel and repeat the process of venting the air from the pump s See step 4 on this page After venting air from the pump s a second time turn the power back on at the main power panel This will initiate a new pump priming mode Sometimes momentarily turning the pump off and on will help it to prime Do not do this more than 5 times Important A pump should not be allowed to run without priming for more than 2 minutes Under NO circumstances should a pump be allowed to run without priming beyond the end of the 4 minute priming mode Doing so may cause damage to the pump and cause the system to
9. and green ground wires This should also read 120 V Turn on the R C D breaker before continuing to the system box 800 645 3201 Voltage Checks System Box R C D Load Out Voltage Check System Box Check at TB1 230 V Dedicated System 230 V Dedicated System Check Be sure the house breaker is on Be sure the R C D breaker is on Be sure the R C D breaker is on Probe the blue and brown wires Look for 230 V Probe the blue and brown wires at the R C D load out Probe the blue and green ground wires for 0 V The voltage should be 230 V Probe the brown and green ground wires also 230 V Probe the blue wire and the green ground wire Recheck voltage under peak load conditions The meter should read 0 V Probe the brown wire and the R C D neutral bar The voltage should read 230 V Peak Load Check PATA Recline volage ined meakai It is important to check the voltage again under peak load conditions To reach peak load turn on the blower A Important heater light and all pumps p Peak Load Check for 230 V System Check the voltage between the blue and brown wires The acceptable voltage range is between 207 and 253 V If the voltage is not within the acceptable range call an electrician or the local electric company to diagnose the problem wwwobalboa instruments com X 9 W iring Schematic Value M 7 and 2000LE M 7 System OFF
10. continues to trip then do the same procedure for the ozone generator If the R C D stops tripping after you unplugged one of the spa s components turn off the power to the spa then plug in each component except the one that tripped the R C D Power up the system If the R C D no longer trips then you have correctly identified the problem Repair or replace the component as instructed by the spa manufacturer If you have unplugged all of the spa s components and the R C D still doesn t reset then the problem is most likely a ground fault in the heater To Disconnect the Heater First turn off the main circuit breaker then remove both heater straps or wires from the terminal block not the heater itself After restoring the power try to reset the R C D again If it no longer trips after the system calls for heat then replace the heater If the R C D still trips look for pinched or shorted wires at the transformer Make sure that the screws that attach the transformer to the system box have not pinched or damaged the insulation of the transformer wires If the transformer wires are undamaged check for any other pinched wires Refer to the wiring diagram to verify the correct wiring of the control system If everything looks to be in perfect working order then the R C D may be defective 22 800 645 3201 Testing the Circuit Board Output Testing the Circuit Board Output If your topside control
11. go into an overheat condition After pump priming push all Jet buttons to turn off the pump s Next manually exit the priming mode by pushing either the Warm or Cool button the Temp button on smaller panels Note that if you do not manually exit the priming mode as described above the priming mode will be automatically terminated after 4 minutes Be sure that the pump s have been primed by this time 14 800 645 3201 Power Up Pump Priming and Software ID cont After you have manually exited the priming mode or the system has automatically exited the priming mode the top side panel will momentarily display the set temperature and then dashes Note that the display is not showing the temperature yet This is because the system requires approximately 2 minutes of water flowing through the heater to determine the water temperature After 2 minutes of water flowing through the heater the temperature will be displayed Push the Warm or Temp button to adjust the temperature to the desired setting If the water temperature in the spa is less than the set temperature the heat indicator will turn on signifying that the heater has been energized When the System is in the Standard operational mode it will automatically heat the spa and maintain it at the set temperature All user buttons will be functional If a higher temperature is desired simply push the Warm or T
12. peak load conditions A Important If the voltage is not in the acceptable range call an electrician or the local electric company to diagnose the problem wwwoalboa instruments com Troubleshooting cont To Determine if Fuse Replacement is Necessary To determine if fuse replacement is necessary perform the following sequence of tests Test the System Turn the power off Be sure to replace the system power input fuse with the same type Unplug the blower and all pumps Restore the power and verify system operation Ifthe fuse blows then re check the internal system wires and connector for burns cracks or cuts in insulation Tf the fuse does not blow turn the power off and plug in the pump Note Be sure to test each device individually Test the Pump Restore the power and activate the pump If the fuse blows there is a pump problem If the fuse does not blow turn off the power Test the Blower Plug in the blower Power up the system and activate the blower If the fuse blows then there is a blower problem If the fuse does not blow the combined pump and blower amperage may be excessive To verify this first check with your spa manufacturer for amperage draw limits on each device Since the blower should now be running you can check the amperage draw with an ammeter by measuring around the black blower wire and compare with manufacturer s specifications Te
13. so the spa won t try to heat during this test as there is no heater protection during this test and verify that they read the same temperature within 1 F 0 5 0 If the problem is solved replace the sensor set If the problem is not solved do not replace the sensor set Plug in the original sensor set to verify that there is not a connection problem If the problem continues after following the above steps then replace the circuit board 8 Ifyou cannot get readings of the sensors on the topside panel even in M7 Test Mode Analysis Display Mode for example because the system always indicates an Overheat condition when it shouldn t You can use an ohmmeter to evaluate the validity of each sensor independently after unplugging the sensors from the circuit board You will need sharp tips on the meter probes or a Balboa Logic Jumper on a Stick to be able to make contact with the little bit of metal of each of the two sensor wires visible through a window on the connector The following chart shows what temperatures certain restistance values translate to 1 5k 231F 110 5C 14 7k 108F 42 5C 3 0k 190F 88 0C 15 4k 106F 41 0C 5 0k 162F 72 0C 16 2k 104F 40 0C 7 0k 144F 62 5C 17 2k 101F 38 5C 9 0k 131F 55 0C 18 1k 99F 37 0C 10 0k 126F 52 5C 20 2k 94F 34 5C 11 1k 121F 49 5C 25 5k 84F 29 0C 11 7k 119F 48 5C 30 0k 77F 25 0C 12 1k 117F 47 5C 40 0k 65F 18 5C 12 7k 115F 46 0C 55 0k 53F 11 5C 13 2k 113F 45 0C 95 0k 32F
14. to function buttons pressed before timeouts were turned off it s thus suggested that timeouts be turned off as the first action after powering up the spa This setting is not saved upon power down NOTE Even thought the main purpose of turning timeouts off is to disable timeouts on manual pump blower light turnons on some models leaving timeouts off can make a pump run forever once it s turned on automatically in certain situations For this reason it s imperative that the spa never be left in test mode for the user And if you re unsure as to whether you turned timeouts off or not in test mode it s safest to exit test mode and then cycle power on the spa On panels which cannot display a letter such as F or C after the temperature In test mode the character that would be shown to the right of the temperature A b F C E or P is instead shown for a split second before the temperature it s for with an equal sign to the right of it For example instead of 41A alternating with 40b you ll see A followed quickly by 41 alternating with b followed quickly by 40 16 800 645 3201 Topside Control Panels Available for the Balboa Value M 7 E Spa Controls lower Jets 3a EID TA Mode warm Balboa Electronic Spa Controls ay i a DOF e Jets Light Standard Digital System Cool Preliminary Panel Check If the problem is not obvious look on the topside control panel for diagn
15. wiring diagram should always be used to ensure proper wire placement Remove all the screws which mount the board to the system enclosure The Value M 7 and the 2000LE M 7 have 2 screws that are located at the upper left and lower right The Elite board uses mounting screws in the terminal block only Remove the board from the plastic stand offs by gently squeezing the locking flange on each stand off with a pair of pliers The board should now be free and can be removed from the system box For the Value M 7 and 2000LE M 7 use care to be sure the connectors on the right side of the board clear the enclosure as the board is removed How to Replace a System Circuit Board Check all jumpers and dip switch positions on the new board Make sure they are in the same position as the old board Make sure the new board snaps in place on the plastic stand offs Use care to be sure the connectors on the right side of the board clear the enclosure openings as the board is installed Ifpresent carefully install the screw which mounts the blower triac TRC2on the Value M 7 and the 2000LE M 7 and TRO6 on the Elite M 7 board Caution Do Not Overtighten this screw e Install all screws which mount the board to the system enclosure The Value M 7 and the 2000LE M 7 have 2 screws that are located at the upper left and lower right The Elite board uses mounting screws in the terminal block only Reconnect all wires and slip on connector
16. with specific software allow the spa to be controlled without the use of external pressure switches flow switches or temperature sensors wwwobalboa instruments com Wiring Checks Safety is key when servicing any spa or spa control panel Remember safety comes first for you and your customer Please take all necessary precautions before attempting any repairs Wiring checks are the first step to ensure safety and proper function before beginning service on a unit A Wiring Check Precautions When working in a system box always be aware that it may contain high voltage Always keep your fingers and hand tools away from any wiring or circuit board when the power is on Touching anything in these areas can result in serious injury All service calls no matter how minor should include a complete wiring check beginning with the house breaker Keep in mind Balboa equipped spas only run on single phase electrical service Three phase power will not supply proper voltage to the system Three phase power may overheat the pumps and cause the Residual Current Device R C D to trip Check for Loose Connections or Damaged Wires Make sure the power is off before you touch any wiring Once the power is off carefully examine all wires for cuts or defects System Box Wire Gauge Check When inspecting the wiring for any control system note that connections for the incoming wires are clearly labeled at the main ter
17. 0 0C 13 6k 112F 44 5C 184 0k 9F 13 0C 14 1k 110F 43 5C 320 0k 9F 23 0C 800 645 3201 Panel Messages cont The Panel Displays dr This indicates that there is not enough water in the heater Spa shuts down for 15 minutes This could indicate poor flow or air bubbles in the heater On the third consecutive occurrence of the above message without a successful heating cycle in between the panel will display d Spa is shut down and will not resetin 15 minutes Press any button to reset manually The Panel Displays Er TSEL G Eor This indicates that the temperature is completely unknown because the pump has not yet run for 2 minutes after Priming Mode was exited This is only displayed for 2 minutes at power up Some Troubleshooting Scenarios 1 You find out the system is in OHH This alone doesn t explain a lot What led up to the OHH is much more important See if the user has any additional information for example how long before the OHH was the spa panel last checked and how hot was the water then If the spa has cooled see whether the problem can happen again this time watching carefully to see if there are additional clues leading to the OHH for example other messages that appear shortly before the OHH happens 2 You find out the system keeps showing HFL or is now in LF or is shut down due to a dry fault Put the spa in test mode wit
18. Instruments Incorporated M 7 Technical Service Manual Table of Contents Balboa Control Service Checklist To Determine if Fuse Replacement is Necessary 12 Test the System Pump Blower 12 Preface oo eee eee eee rererere 4 Test the Amperage Draw 000 eeeee 12 Tools Required Pete enna es 4 Test the Soldered in Fuse nnana 12 System Components Required icce 4 Value M 7 and 2000LE M 7 Systems 12 Safety TIPS su cei eoa SEAE AANE 4 Flite System oonan 13 ngs Transformer Installation Requirement 13 system Description Confirm Transformer Connections 13 Topside Control Panel spas peer ee ae Pepsi 5 a indi id 5 Power Up Priming and Software ID M7 SONSOIS sarau ear ma rise riam seperie s Power Up Priming and Software ID 14 15 Wiring Checks Test M ode Operation Wiring Check Precautions io 6 Selecting Test Mode and Analysis Display Mode 16 System Box Wire Gauge Check erre 6 Differences in the Display when in Test Mode 16 RCD Wiring Check raras 6 Differences in the Display when in Display Mode 16 R C D Line in Wiring Check nnana 7 5 R C D Line out Wiring Check 0 00 000 7 Topside Control Panel ZA DELGADA puta pi ania Mata Value M 7 2000LE M 7 Flite Voltage Checks Preliminary Panel Check c0ceeeeeee 17 Bulb Replacements ias sangre sda RED Lire 17 Breaker Box Voltage Check eee sees
19. Panel Displays 5A SnA Sn or The Panel Displays 5b 5nh SnE This indicates that the spa has shut down due to an open or faulty sensor If the problem recurs test the sensor set See page 20 Note In rare cases rapid system overheat causes sensor error messages Be sure to rule out possible situations like no flow or no water The Panel Displays 5n 5n5 This indicates that the sensors are out of balance If alternating with temperature it may just be a temporary condition If flashing by itself spa is shut down If the panel also displays Service Reqd spa is shut down If the spa shuts down due to this error one or both of the sensors are probably reading several degrees off If the problem recurs test the sensor set See page 20 18 wwwhalboa instruments com 800 645 3201 Panel Messages cont The Panel Displays Cd tid This indicates that a sensor detects a possible freeze condition This message does not appear on M 7 software showing a Software Version ID of 01 or greater This is a normal spa function no further action is necessary When either sensor reads below 4 5 C the system provides freeze protection It automatically activates the pump and the heater if necessary to circulate the water and warm the plumbing The equipment stays on until the sensors detect that the spa temperature has risen to within 8 0 C of the set temperature The other pumps and the blower will pu
20. ation cc cece ee eee es Heater Startup Information 0eee Dip Switch and J umper Settings HOTU ea borides Eita eat witee beaten Riad 27 Value M 7 TUV Circuit Board Value M 7 TUV Circuit Board 00 2000LE M 7 TUV Circuit Board 2000LE M 7 TUV Circuit Board 0 Elite TUV Circuit Board Elite TUV Circuit Board aa rig any www balboa instruments com End User Warning This Technical Service Manual is provided solely to aid qualified spa service technicians in troubleshooting and repairing spas with control systems manufactured by Balboa Instruments Inc Balboa controls have absolutely no end user serviceable parts Balboa Instruments does not authorize attempts by the spa owner user to repair or service any Balboa products Non qualified users should never open or remove covers as this will expose dangerous voltage points and other dangerous risks Please contact your dealer or authorized repair center for service Balboa Control Service Checklist Preface This manual is provided to aid the qualified service technician in troubleshooting and correcting problems found in spas with M 7 Technology and control systems manufactured by Balboa Instruments Inc Tools Required e Ammeter 504 Digital Multi meter Balboa Logic Jumper on a Stick Balboa Six in one Screwdriver Includes Two Phillips Head and Two Flathead Screwdrivers Along with a 7 mm and 8 mm Nut D
21. d connect to load out the blue wire from neutral out All wires will exit the box via conduit routed to the spa control system Once you have found all wiring correctly installed begin to check for proper voltage www balboa instruments com Voltage Checks Breaker Box R C D When checking for proper voltage please keep in mind that the acceptable voltage range is 10 of the recommended voltage Acceptable voltage when 230 Vis specified as the desired voltage is between 207 and 253 V A Important This service must be single phase Any abnormal voltage reading requires an electrician Do not attempt to fix problems yourself High voltage can seriously injure or kill Breaker Box Voltage Check Set your multi meter or voltmeter for AC Volts Make sure the R C D is off Carefully turn on the spa circuit breaker At the house breaker box probe the spa circuit breaker between the blue and brown wires Your meter should read 230 V Probe between the brown and green ground wires You should also see 230 V The voltage between the blue load neutral and the green ground wire should be approximately 0 V R C D Line In Voltage Check 230 V Dedicated System Be sure the spa circuit breaker located in the house breaker box is on Make sure the R C D is off Probe the blue and brown wires The meter should read 230 V Probe the blue and green ground wires The meter should read 230 V Probe the brown
22. emp button until the desired temperature is displayed The maximum temperature setting is 40 C Other energy saving operation modes are selectable by pushing Mode or mode button sequence 6 After the System has been powered up and the pumps have been primed make a final voltage check at the System terminal block Voltage Check 1 Activate the low speed of the pump 2 Adjust the temperature to turn on the heater 3 Activate any other equipment that does not turn off the heater 4 Activate the light 5 Check the voltage The voltage for 230V systems should be 207 253 between line and neutral Note If the voltage is not within tolerance while the System is operating as described above turn off the power at the main power panel and correct the problem before continuing to operate the System wwwobalboa instruments com X 15 Test Mode Operation Selecting Test Mode and Analysis Display Mode The software is in test mode when J43 is on 2 pins on the Elite or when DIP switch 1 is ON on all models that have a DIP switch at the edge of the circuit board Test mode may be entered and exited by changing the jumper or switch setting at any time no need to cycle power The software goes into analysis display mode when in test mode and the light is on at any intensity if light is dimmable Note that on models where the light button is combined with the pump button it is not possible to go into anal
23. est high quality state of the art digital control systems Balboa control systems are technologically sophisticated yet easy to understand use and troubleshoot Topside Control Panel The control panel activates functions at the touch ofa button Each function will echo from the circuit board to the LCD in a corresponding manner The panel will also display diagnostic messages which enable the service technician to easily troubleshoot the system Circuit Board A typical circuit board has the following output capabilities 230 VAC System Two speed pump 230 VAC 50 Hz 2 HP Single speed pump 230 VAC 50 Hz 2 HP Blower 230 VAC 50 Hz 2 HP Heater 230 VAC 50 Hz 5 5 kW Light 12 V 12 W 50 Hz 1A or 120 V 100 W In addition to these outputs the board receives input from the two temperature sensors located within the heater housing A Important Do not remove and replace the circuit board unless you have tested all other components and proven that the circuit board is actually causing the problem M 7 Sensors The two sensors located within the heater housing compare the inlet water temperature with the outlet water temperature regardless of water flow direction to determine the presence of water low flow temperature limits and operating temperatures The system will automatically select the sensor that is exposed to the lowest temperature as the spa water temp controlling sensor The sensors in combination
24. h the light on so that you see the two sensor temperatures Are they normal within 1 F 0 5 C when not heating How far apart are they when heating HFL happens when they are 6 F 3 C apart 4 F 2 C on 120V and other low heater wattage systems see how quickly that happens after heating starts If it s getting close to that right away it s probably a consistent flow problem but if it s nowhere close to the HFL causing temperature difference the flow problem may be intermittent or only occur in certain specific situations wwwobalboa instruments com 21 R C D Troubleshooting Keep in mind that a majority of R C D tripping problems can be attributed to incorrect wiring R C D troubleshooting usually finds the problem If Correct W iring is Verified Check to see if the proper R C D is installed Check the label in the system box near TB1 to determine the maximum amperage draw for the system Be sure the R C D is rated for more amperage than the system will draw For a 230 V dedicated system a 2 pole or 4 pole R C D with no load neutral is acceptable For a detailed wiring checklist please review the previous segment of this manual on proper R C D wiring or the R C D manufacturer s instructions If the wiring is correct and the R C D will not reset then unplug the pump and try to reset the R C D If the R C D trips again then unplug the blower and push the reset button If the R C D
25. ine fuse or the power input fuse is usually a symptom of a faulty pump blower or a short in the wiring to one of those devices Ifthe fuse is good then replace the output connector If the high speed pump comes on when the system calls for heat or when the system goes into a filter cycle the pump is most likely wired backwards Verify that the blue low speed and brown high speed wires are not switched in the amp connector or the pump itself Always check to make sure all devices are plugged into the proper location Note If the spa light output is not detected with the Balboa Quick Check be sure to check continuity of the light fuse on the circuit board wwwoalboa instruments com 23 Changing a System Circuit Board A Important Be sure to turn the power off before replacing any component especially a circuit board A Important Do not remove and replace the circuit board unless the fault has positively been determined to be the circuit board How to Remove a System Circuit Board Shut OFF line power to the spa at the main circuit breaker panel Do not attempt to service a spa without shutting off the power Serious injury or damage may result If present remove the screw which mounts the blower triac TRC2 on the Value M 7 and the 2000LE M 7 boards Disconnect all wires and slip on connectors as necessary to remove the board Note Labeling these wires may help speed up reinstallation The
26. ing the union nuts on the discharge of all pumps Allow a small amount of water and air to escape from the pump s and related plumbing Retighten the union nuts 5 Turn the power on at the main power panel Depending on which top side panel the System is configured for the displays will go through specific sequences During these sequences you will need to prime the pump s as described in the following The following will occur Display will show a series of numbers immediately following Power Up On M 7 softwares created or updated since May 2001 this will be a series of four numbers The first three numbers in combination are called the Software ID The three numbers in order are the Software Manufacturer ID the Software Product Type ID and the Software Version ID Following the Software ID will be either 12 or 24 indicating the heater wattage the software is configured for There are differences in freeze protection between units that display a Software Version ID of 00 or that don t display a Software ID at all versus units that display a Software Version ID of 01 or greater Display will show Pr indicating that the System is in a pump priming mode During this mode the heater is disabled to allow the priming process to be completed without the possibility of energizing the heater under low flow or no flow conditions Nothing comes on automatically but the pump s can be energized by pushing all Jet buttons
27. l with a screwdriver Next locate the gray bulb holes in the back of the panel Use a screwdriver to turn the bulb approximately 7 mm to remove and replace the bulb Needlenose pliers may also be useful Remote Panel Troubleshooting Remote panel applications need special consideration where the panels connect to the circuit board If You are Working on a Spa Witha Remote Panel Before replacing the circuit board or any panel remove the gang connector from the system box and plug in each panel into the circuit board directly and individually Test all functions with each panel separately If a Remote Panel Doesn t Work Remove the remote panel from its location Be sure to secure the end of the panel cable Plug the remote panel directly into the board This removes the extension loom with its one to one connector from the circuit board and will help you determine whether you have one panel with a problem a defective gang connector a bad extension loom a bad one to one connector or a circuit board problem wwwobalboa instruments com 17 Panel Messages cont Panel messages are a quick clue toward solving a variety of problems Here are the most common messages and what they mean The Panel Displays HH GHH At least one of the sensors has detected water temperatures of 48 0 C inside the heater or The Panel Displays UH OHS One of the sensors has detected the temperature of the wate
28. lts by putting J43 on 2 pins during power up until Pr is displayed Must be on 1 pin otherwise for persistent memory to work www balboa instruments com 29 2000LE M 7 TUV Cirquit Board oe eee 4 sh pe EP e a o E E pa ET a dia a ur A mai rea Ge 8 Co a Circuit Board Components 1 A C Input 18 Pump 2 low relay K11 optional 2 Onboara load fuses 19 Pump 2 low output J20 eta 20 Pump 2 hi relay K9 optional 3 Inboard fuse F4 21 Pump 2 hi output J13 4 Spa and fiber optic light fuse 3A 250V F1 22 Ozone relay K7 5 Onboard blower fuse F7 23 Ozone output J14 6 Transformer input 24 12 120 VAC option for spa light or fiber optic light J56 J57 7 Control panel input Serial Standard and Deluxe panels 29 Spa li it and ter ye light relay K5 optional 3 speed 8 10 nosion dip switch modes of operation see 26 Spa ight and fiber optic output 9 Aux freeze protection circuit J22 b tay for spa light only 10 a Sensor A connection 27 Heater relay K2 b Sensor B connection 28 Heater output A and B 11 Ue main PEORES 29 High limit relays A and B 12 Fiber optic wheel K0 30 Serial Number Model Number Designation 13 Fiber optic wheel output J26 J43 Reset persistent memory to defaults by putting J43 on 2 14 Pump 1 low relay K1 pins during power up until Pr is displayed Must be on 1 15 Pump 1 low output J29 pin otherwise for persistent memory
29. minal block 30A service minimum ten gauge copper wire 40A service minimum eight gauge copper wire 50A service minimum six gauge copper wire These wires must connect the house breaker box through the local disconnect to the main terminal block The wiring diagram inside the system box shows the main terminal block as TB1 A Important Using non copper wire can be dangerous and also can be the cause of a spa s malfunction If non copper wire is used at any point we do not recommend servicing the spa until an electrician replaces it with the proper gauge copper wire A Important This service must be single phase Any abnormal voltage reading requires an electrician Do not attempt to fix these types of problems yourself High voltage can seriously injure or kill R C D Wiring Check If a Residual Current Device has recently been installed a majority of tripping problems can be attributed to incorrect wiring of the R C D A clear understanding of the correct configuration is essential Please refer to the figure on page 10 as needed 800 645 3201 Wiring Check for R C D Service Disconnect A Important Most regional codes state that a service disconnect breaker box an R C D can be used for this purpose must be located at least five feet away from the spa and should be conveniently located near the equipment bay If itis not in plain sight keep the disconnect padlocked when in the
30. ng but are showing excessive 2 F 1 0 C or more difference between the two sensors when not heating a possible cause of Sn SnS HL HFL and LF LOW messages do the following Note which sensor is reading consistently higher Avs B or tvs H Unplug the two sensors from the circuit board and interchange them ie plug the one that was in the A or tjack into the B or Hjack and vice versa Press a panel button if any stray faults appeared during the process Stray fault are normal when sensors are unplugged then plugged back in while the system is running Within a minute or so see if the same or other sensor is now reading consistently higher Ifthe same sensor A vs B or tvs H is reading higher after the sensor interchange the problem is on the circuit board Replace the circuit board If the opposite sensor is now reading higher the problem is with the sensor s Replace the sensor set If you wait more than 2 minutes after plugging the sensors back in heating may start even outside a filter in Economy or Sleep mode due to a stray Cd CLd COLD WATER condition usually detected when sensors are being plugged in while the system is running If there is a message indicating an open or faulty sensor Unplug the sensor set but leave the original sensors in the heater and plug in the test sensor set Put both sensors into the same cup of warm water ideally above the set temperature
31. ns For configurations other than described call Balboa Instruments Impor tant The illustrations at left indicate how the logic jumpers are used If a jumper is installed on two pins it is completing a circuit across the two pins If it is installed on one pin the circuit between the two pins is open Sometimes a logic jumper will be used on a group of three pins and depending on which two pins have been connected by the jumper feature A or B will be enabled wwwobalboa instruments com 27 Dip Switch and Jumper Settings Elite Chart J umper Function of umper Position J 6 Selects circ non circ pump option oa Non circ pump selected j7 Selects top side panel being used pa Deluxe panel selected J 9 Selects 120V 230V logic 20A 4 230V 50A logic selected J 10 Selects 1 or 2 speed pump 2 operation Da 1 speed operation selected J 16 Enables O message Da 0 message disabled J 24 Disables ORP g ORP disabled J25 Spa light 601z position Fiber optic light 50Hz position pa 60hz spa light operation selected J36 Allows memory storage and resets memory 8 Memory storage allowed J 46 Disables pump 2 Da Pump 2 enabled Note The above jumper settings are factory set and DO NOT need alteration for Portion of PC board the configuration shown on page 22 This chart is for verification only O for Elite showing The J umper symbols shown here are oriented to correspond to their actual location of jumpers
32. off position Precautions In most areas R C D s are required for spa installations In other areas R C D s are recommended for spa installations but are not mandatory If the spa you are servicing was not installed with a R C D strongly urge your customer to improve safety and comply with current standards by installing one Note A suitable R C D may be acquired through your local distributor A Important Remember high voltage is still accessible in the house breaker box even though you have turned off the spa breaker R C D Line in W iring Check Locate the proper circuit breaker and turn it off Remove the cover from the house breaker box Check the main service amperage rating to the breaker box Note Typically a house circuit will require at least a 100 Amp service when a spa is installed From the circuit breaker locate the brown load wire and the blue neutral wire From the R C D neutral bar locate the blue load neutral and the green ground wire Be sure there are no other appliances on the spa circuit If there are service must be re wired to supply the spa only Make sure all three wires exit the house breaker box via conduit routed to the R C D breaker box The brown should be connected to the R C D line in The blue load neutral connects to the neutral in R C D Line out W iring Check for 230 V Dedicated System 3 wire system induding ground wire The brown wire shoul
33. or freeze protection in progress on M7 software showing a Software Version ID of 01 or greater which behaves as follows Any time the lower of the two temperature sensors goes below 7 0 C all pumps blowers turn on They continue to run for 4 minutes after the temperature reaches 7 0 C or above As soon as the temperature falls below 7 0 C again this process restarts This simplified sensor freeze protection functions at all times even when another fault condition other than total sensor failure has occurred and has otherwise shut the spa down The Panel Displays Hi HFL This indicates that a substantial difference in temperature between sensors has been detected during heating This could indicate a flow problem Check water level in spa Refill if necessary If the water level is okay make sure the pumps have been primed On the fifth occurrence of the above message the panel will display LF This indicates a persistent flow problem The heater is shut down while all other spa functions continue to run normally Power on the spa must be cycled before the heater will function again continued on page 21 wwwobalboa instruments com 19 Panel Messages cont Testing the Sensor Set Check sensor wires for cracks or damage that may indicate the presence of a rodent Inspect the connections of both sensors on the circuit board The plugs must be clean Ifthe sensors are not totally faili
34. ostic messages If no messages are seen run through all spa functions and note any inconsistent operation If diagnostic messages appear on the topside control panel see page 18 for troubleshooting tips Once you have determined that proper voltage is running through the circuit board and transformer continue to the topside control panel A panel that is not functioning properly may include the following symptoms low voltage such as missing or scrambled segments missing icons on the LCD non functional LED s or nonfunctional buttons If any of these symptoms are present perform the following Turn the power off and unplug the panel from the circuit board Then plug in your test panel and restore power If everything functions normally replace the topside panel If you still see symptoms of low voltage such as a sluggish blank or partially blank panel or if the display or the LED s do not function at all turn the power off and replace the circuit board E Duplex Digital System Z A des 7 Available for the Flite MBalhoa mm tome us 7 Ecm i E E Deluxe Digital Syster eee d oe e a E Hode Prog Electronic Spa Controls o A hess s 1 Deluxe Panel Balboa a15 Electronic Spa Controls ti System Cool Bulb Replacement Another panel problem may be burned out backlighting bulbs These bulbs can easily be replaced With the power off gently pry up the topside control pane
35. ower input fuse measure F6 in the same manner You should also see 230 volts Ifyou determine that there is no voltage at one or both locations then the system power input fuse s need to be replaced Both Fo and F6 use a 25A time delay fuse Only use a fuse of the same type and amp rating when you replace any of these fuses Elite System If the system is getting the proper voltage at TB1 but still does not operate then test for a blown power input fuse If the system you are troubleshooting is a 2000LE M 7 or a Value M 7 System the power input fuses snap directly to the circuit board Ifyou determine that there is no voltage at one or both locations then the system power input fuse needs to be replaced Both fingers 5 and 6 utilize a 30A time delay fuse Remember the system power input fuse may snap directly to the circuit board next to TB1 To check these fuses probe finger 5 and the side of the system power input fuse farthest away from finger 6 If there is no voltage the 30A time delay fuse must be replaced Note For All Systems In each situation the most likely reason for the system power input fuse to blow is a pump problem However on occasion a blower problem may also cause this fuse to blow if a 10A blower fuse is not built in Once the power input fuse has been changed e Probe the brown and blue neutral wires Again voltage must be between 207 and 253 V These readings should be taken under
36. panel is working properly but a pump blower or other device does not activate when its panel button is pressed further diagnosis is easily accomplished with the Balboa Quick CheckTM Quick Check Test Kit To use the Balboa Quick Check Turn off the power at the house breaker box Unplug the device in question and plug the Quick Check in its place Restore power to the spa and press the appropriate panel button again If the Quick Check s light appears the device in question is receiving voltage An ordinary multi meter can also be used to check for proper output voltage except when working with a variable speed blower or a dimmable spa light In these cases a component on the circuit board called a triac needs to be under a small load to test output voltage Even if the system is not equipped with a blower triac the best way to verify voltage output is with the Balboa Quick Check Ifthe Quick Check light does not appear after pressing the appropriate panel button trace the wires from the corresponding connector in the system box back to the circuit board Probe these connections at the circuit board after activating the function with the topside control panel If you do not have correct voltage double check the input voltage before you replace the circuit board Ifyou do have correct voltage at the circuit board turn off the system power and check for a blown in line fuse Blowing the in l
37. r coming into the heater to be 43 5 C and so the water in the spa is likely to be that hot These indicate that the spa has shut down due to an overheat situation Note Overheating may occur if the low speed pump is set to operate for extended periods of time or if the incorrect pump is installed In rare cases usually warmer climates the circulation pump may also cause overheating The following is a list of most probable causes of this message Inspect these first e Check slice or ball valves Make sure that they are open Make sure the correct pump is installed e Clean the filter skimmer if there is any blockage Check heater element alignment e Check for debris on the heater element In extremely hot weather check for proper cabinet ventilation Make sure the temperature sensor is fully inserted into the sensor fitting on the heater Check for excessive filter duration Note Acommon programming mistake is overlapping filter times that may cause the spa to filter continuously e Check the water level e Check the water temperature with an accurate temperature thermometer Remove the spa cover and allow the water to cool to below 42 0 C Adding cool water may be necessary Touch any button to reset the system If the water is still hotter than the set temperature press the blower button if applicable to cool the spa If the Problem Recurs Test the Sensor Set See page 20 The
38. rge for 30 seconds to 2 minutes at the end of the freeze condition If pump 1 was turned on due to this reason alone this message will appear for up to two minutes right after very cold water is detected Note Internal freeze protection only functions when there is proper power running to the spa and the control system is operational Using an optional freeze sensor may be necessary in extreme climates to prevent plumbing damage but will only work properly if placed inside the spa skirt in the coldest area All spa models are different in shape and size and have different thermal characteristics therefore Balboa Instruments Inc cannot be held responsible for freeze damage to the spa s plumbing Testing is the responsibility of the spa manufacturer and must be done to determine the best location for the freeze sensor The Panel Displays iL iL This indicates that the auxiliary sensor detects a possible freeze condition This is a normal spa function no further action is necessary When the auxiliary sensor reads around 40 F actual temperature dependent on specific auxiliary sensor used the system provides freeze protection It automatically activates all of the pumps and the blower to circulate water and warm the plumbing Note This auxiliary freeze protection functions at all times even when another fault condition has occurred and has otherwise shut the spa down This message can also indicate simplified sens
39. river 8mm Socket 7mm Open End Wrench Small Wire Cutters Pliers amp Needlenose Pliers Quick Check Test Kit Precision Thermometer Digital Fever Type Padlock to lock electrical disconnect during service Plumber s Sealant System Components Required Fuses 30 and 20A time delay plus 20 10 and 3A System Transformers 230 V System Sensor Assembly System Panel s System Circuit Board A Important Due to the danger of severe electrical shock locate all power disconnects before servicing a spa Precautions must be taken whenever working with breaker boxes R C D s or service disconnects Always refer to the wiring diagram which is included with each system on the inside of the system box cover Use this diagram for voltage measurement points and for proper reconnection of wires A Important Be sure to bring the correct circuit board topside control panel components and tools A Safety Tips Keep children and pets away Be aware of your surroundings Standing in water while repairing a spa puts you at serious risk e Avoid working in cramped or crowded conditions Digital Fever Thermometer Balboa Logic Jumper on a Stick DANGER SHOCK HAZARD DO NOT PROCEED IF UNQUALIFIED IN WORKING WITH HIGH VOLTAGE 800 645 3201 a System Description Highly advanced microprocessor technology has been combined with solid state electronic switches to produce the world s fin
40. s Restore power to the spa at the main breaker Test to make sure all functions work correctly See the photos on pages 32 35 for additional information about Balboa circuit boards 24 800 645 3201 Spa Behavior See manufacturer s owners manual or reference card for general information on operating the spa including programming filters and other settings that are changed from the topside control panel In Priming Mode the Mode button toggles the ozone on off with a 15 second timeout This can be useful if you want to verify ozone generator operation without waiting for a filter This feature is not available on smaller panels where Mode is a multi button sequence since such a sequence exits Priming Mode General Filter Information On any system with a Deluxe panel the filter times and durations are completely programmable from the topside control panel and the first filter may not run for many hours after power up If you want the filter to run sooner you have to either reprogram the filter or advance the time to just before the filter start On all other systems the first filter starts 6 minutes after power up and the duration can be chosen either using button sequences on the topside control panel or via a DIP switch between several preset choices Note that if you let Priming Mode exit automatically after 4 minutes you have 2 more minutes before the first filter runs after power up Exiting
41. side of the soldered in fuse The voltage should read 230 V Tfeither side has 0 voltage then the fuse is blown If so turn off the power and replace the circuit board See page 24 Make sure that the transformer is properly rated for the system The voltage reading between fingers 5 and 6 on the circuit board will determine the proper transformer input voltage for Deluxe and Standard models Ifyou determine that the soldered in fuse is not blown this means that the transformer is receiving voltage Note These slow blow fuses are not always discolored when blown Always test continuity of a fuse with an ohmmeter Note Miswiring of the spa is the most common reason for this fuse to blow However a lightning strike in the area is a possible though less likely cause of the failure Transformer Installation Requirement Applies to Elite only other systems have the transformer as a permanent part of the circuit board Confirm Transformer Connections Intermittent problems may occur when transformer connections are loose Make sure your fingers are away from exposed high voltage connections Wiggle the transformer wires near the connector on the circuit board This will determine if there is a loose transformer connection or bad pin on the circuit board Ifthe system intermittently turns on and off turn the power off Plug in the test transformer restore the power and wiggle the transformer wires again
42. st the Amperage Draw Turn off the power disconnect the blower make sure the pump is plugged in and restore power Start the pump and switch to high speed if available this should draw the most current Make sure all jets and valves are open Check the amperage at the brown pump wire Compare your reading with manufacturer specifications If the other plug in devices exist they should be tested in the same way Ifthe amperage draw for each device is within manufacturer s specifications the problem could be a nuisance spike in the pump or water in the blower Test the Soldered in Fuse Value M 7 and 2000LE M 7 Systems Probe from the brown TB1 terminal and one side of the soldered in fuse The voltage should read 230 volts Probe from the brown TB1 terminal and the other side of the soldered in fuse The voltage should read 230 volts 12 800 645 3201 Troubleshooting cont Elite System Fora class 2 transformer circuit a fuse must be permanently installed to protect the circuit board If you have determined that the system is getting proper voltage through the power input fuse then you must check to see if the soldered in fuse has blown First turn off the power Next unplug the transformer from the circuit board then turn the power back on and probe from the red TB1 terminal to one side of the fuse The voltage should read 230 V Probe from finger 5 to the other
43. to work 16 Pump 1 hi relay K6 17 Pump 1 hi output J28 ow o X 800 645 3201 Elite TUV Circuit snail iE a E it Eh sm E ea viste SE na Re errr sss eae m ar E m eel el Circuit Board Components 1 Blower Triac TRO6 or optional 1 speed blower relay Use Screw For Heat Sink Only Do Not Overtighten 2 Blower Hookup 3 Control Panel Input 4 Finger 5 5 Finger 6 6 Filter Select Jumper Standard Only J7 7a SensorA 7b Sensor B 8 Aux Freeze Control Sensor Input J15 9 1 4 Amp 230V Fuse 2 10 Light Fuse 3A 250V 11 Main Processor with software number 12 Orp Enable Jumper J24 13 Ozone Enable Jumper J16 14 Ozone Generator Hookup 15 Perimeter Light Hookup or Optional Circ Pump 16 pH Orp Sensor Input J11 17 Pump 1 Hookup Low 18 Pump 2 Enable Jumper J10 19 Pump 2 Hookup Low i Ji gsi biii H gi a EE penas a PESIC E iram a sof eater Dee io a Auxiliary Panel Input Serial Number Model Number Designations Fiber Optic Spa Light Option J25 Soldered in Thermal Fuse Protection Spa Light Hookup J39 J40 Transformer Input 504 20A Jumper J9 Battery Backup Enable Jumper J36 Pump 1 Hookup High Pump 2 Hookup High Pump 1 High Common Hookup Fiber Optic Wheel Hookup J43 Fiber Optic Light Hookup J21 12V or 230V Spa Light Jumper J59 J62 Misc 1 Jumper J46 Misc 2
44. ttage At this point the heat indicator on the panel is solid During this time the panel is not immediately responsive The heater turns off for 90 seconds making sure that the water flow keeps the temperature rise small and short Abnormal water flows or lack of water will produce a large and or long temperature rise and the system faults in that situation At this point the heat indicator on the panel may appear to shimmer or dim on some panels this may be less obvious from certain angles and more obvious from other angles or in different lighting Ifthe dry fire test has passed heating turns back on to heat the spa The heat indicator on the panel returns to solid During spa heating a difference between the sensors of 2 F 1 0 C or perhaps 3 F 1 5 C at least with 4 6kW 230V heaters is considered normal A significantly higher difference however is usually indicative of a flow problem and will cause a fault which disables the heating for at least a minute and then restarts the whole above process wwwobalboa instruments com 25 Dip Sw itch and Jumper Settings Value M 7 S Mode of Operation On Off S10 30 50 Amp 30A 50A s Deg C F C FP S7 NA NA NA S6 50 60 HZ 50HZ 60HZ s5 NA NA NA S4 NA Must be off NA NA S Panel Option Mini DigDup S2 NA NA NA S1 Test Mode of On Jumper J43 is persistent memory reset Reset persistent memory to default by putting J43 on 2 pins
45. ysis display mode without the pump running Differences in the display when in test mode but not in analysis display mode In standard mode circ or non circ temperature shimmers when not current In economy mode circ or non circ temperature shimmers when not current and is always displayed with E instead of F or C In sleep mode circ or non circ temperature shimmers when not current and is always displayed with P instead of F or C Differences in the display when in analysis display mode On the Elite Whether in standard economy or sleep mode and circ or non circ temperature display alternates between displaying temp connector sensor temperature with t instead of F or C and high limit connector sensor temperature with H instead of F or C These sensors are not actually serving different temp versus high limit functions the labeling on the circuit board simply predates M7 nomenclature On all other models Whether in standard economy or sleep mode and circ or non circ temperature display alternates between displaying A connector sensor temperature with A instead of F or C and b connector sensor temperature with b instead of F or C Pressing Mode toggles pump blower light timeouts off displays toOF or tF and back on displays toOn or tn When timeouts are off ozone disabling on function button presses is suppressed but not retroactively
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