True Manufacturing Company GDM-26 User's Manual
Contents
1. until controller reads USE unplug the cabinet and plug it back in At this point the red LED in center of the control should be on which means that the control is in perishable mode How do perform a Half reset and what is it Half reset clears any of the learning memory e Push the set button key looks like a snow flake the screen should show PAS You will now need to enter the key dance e Press the snow flake key 3 beeps Press the up arrow key 2 beeps Press the down arrow key1 beep e Press the water drops key4 beeps should show display of PS Press and hold the down arrow key until you view HR e Press the snow flake key display should show PAS Re enter key dance and the Half Reset is complete 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service truemfg com GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL NORMAL OPERATING CODES Normal operating mode Cabinet should be holding proper product temperature Units is in defrost Compressor has been shut off and evaporator fan motor is running to clear any ice that may have accumulated This is a predetermined program function Units is in Standby mode Control will cycle the unit at a warmer temperature Lights will be off FAULT CODES TROUBLESHOOTING Freeze up protection This unit has gone down below the minimum temperature Set Point Possible Problems Action to take Com2. 2 Value Ohms soe 70000hms 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service truemfg com GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL TROUBLESHOOTING GUIDE TROUBLESHOOTING GUIDE Please note this does not cover any and all situations Possible Cause Cabinet not cold enough 1 No product in cabinet 1 Load cabinet Elstat is equipped with a anti short cycle that can make the unit run warm with no product 2 Unit in a unpredictable 2 Move cabinet or put into location Elstat control may be Perishable mode going in standby mode 3 Unit was in a previous 3 Perform half reset location Warm Product 1 Unit in a unpredictable 1 Move cabinet or put into location Elstat control may be Perishable mode going into standby mode 2 Compressor not running 2 Check for out put voltage at controller If good follow compressor diagnosis 3 Compressor running 3 Follow refrigeration trouble shooting guides 4 Unit in standby mode Unit displaying a 1 Unit recently worked 1 Reset the DIS parameter to temperature instead of on Parameters have been 0 use changed 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service otruemfg com
3. ELSTAT TRAINING BOOKLET GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL TABLE OF CONTENTS ELSTAT SEQUENCE OF OPERATION ELSTAT COMPONENTS FRONT VIEW OF ELSTAT REAR VIEW OF CONTROLLER FREQUENTLY ASKED QUESTIONS FAQ NORMAL OPERATING CODES FAULT CODES TROUBLESHOOTING TROUBLESHOOTING GUIDE PARAMETERS ELSTAT SEQUENCE OF OPERATION Once the cabinet is plugged in the ELSTAT control will flash 388 and then go through a parameter check Once completed the control will do a soft start Lights come on first approximately 30 seconds later the compressor will start Approximately 30 seconds from the compressor start up the evap motor will start The control will display Use The control will then cycle the compressor on and off at the predetermined temp Model specific The whole time the controller is on it is learning the customer traffic Once enough data has been accumulated the controller will now cycle between two modes Standby and Use In the standby mode the controller predicts that customer traffic is nonexistent It will display It cycles the compressor to hold about 50 F It shuts the lights off and cycles the evap fan motor It will hold this pattern until roughly 2 hours before customer traffic is predicted to start The controller will then switch into the use mode Cycling the compressor on and off based on temperature Approx 36 F to 38 F product temp Running lights continu
4. at come out of the Stand by mode before its predetermined time No If the motion sensor is set off during the Stand by mode the control will automatically turn the lights on however it will stay in stand by mode Can the Elstat be set up for continuous use and not go into the Stand by mode Yes The control can be set into perishable mode This would shut down the stand by mode The lights will still cycle like stand by mode when cabinet doesn t see activity NOTE There is no ability to set lights on all the time Can lights be set to stay on at all times No Elstat controller does not have this capability Lights will always turn off in stand by Mode How do put controller into Perishable mode Perishable mode is used when anything perishable is being stored in the cabinet In perishable mode cabinet will maintain a 36 F 38 F product temperature The cabinet will not go into standby mode NOTE All Energy Star cabinets are shipped in perishable mode e Press the set button key looks like a snow flake the screen should show PAS You will now need to enter the key dance e Press the snow flake key 3 beeps Press the up arrow key 2 beeps Press the down arrow key1 beep e Press the water drops key 4 beeps should show display of PS Now press and hold down the snow flake key until the screen shows PEr and 00 Next press and hold the up arrow key until the screen shows PEr and 01 e Wait
5. ously The controller will then cycle between these two modes GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL EESTAT COMPONENTS Controller Transformer Probe Evaporator Fan Evaporator Fan Evaporator Coil Evaporator Coil Airflow Airflow a a Elstat E El ce E E E E Probe Location 1 Probe Location 2 GDM 10 through GDM 37 GDM 45 to GDM 72 Probe is in return air mounted by the evaporator fan motor Probe is in the discharge air stream Off of the Evaporator Coil 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service truemfg com GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL FRONT VIEW OF ELSTAT Perishable Mode Light Fan Blade fan Red Dot sensor LED Snow Flake compressor Hot key Port POU Ports Parameter Download Unit Motion LK Sensor GOR A Pr gt e CO ELA E E Waterdrops Snowflake Up Down Key elstat 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service otruemfg com GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL REAR VIEW OF CONTROLLER NO NAME 6 Fan s 8 NotUsed 9 NotUsed 2001 East Terra Lane O Fallon MO 63366 ph 636 240 2400 toll free 800 325 6152 service truemfg com GDM SERIES COOLER EQUIPPED WITH EMS ELSTAT CONTROL FREQUENTLY ASKED QUESTIONS Can the Elst
6. pressor not shutting off Check compressor Relay at controller Faulty Probe Ohm out evaporator probe Parameters have been Check parameter list changed Power supply voltage is low Possible Problems Action to take Poor voltage at outlet Verify proper voltage to cabinet Faulty Transformer Verify 120V to transformer Check for 12V on secondary Connector 7 see page 2 Faulty Controller Bypass control to see if system will run Faulty Elstat If 12V is present at connector 7 replace Elstat Probe failure Possible Problems Action to take Connector off at controller Verify that connector 4 is in place see page 2 Ohm out probe Probe is shorted Ohm out probe Ohm out probe wire Refrigeration System Failure The unit has not satisfied the set point in the amount of time allowed Possible Problems Action to take Check the Refrigeration System Ohm out evaporator probe Bypass control to see if system will run Check the parameter list Power supply voltage is too high Unit is not cooling Faulty Probe Faulty Controller Parameters have been changed Possible Problems Action to take High voltage at outlet Verify proper voltage to cabinet Faulty Transformer Verify 120V to transformer Check for 12V on secondary Connector 7 see page 2 Faulty Elstat If 12V is present at connector 7 replace Elstat Elstat Probes by the evaporator motor GDM 10 to 33 probes in air stream GDM 35 to 7
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