True Manufacturing Company Swing Glass Door Merchandiser Refrigerator Gdm 26 Users Manual Elstat Training Booklet

GDM-26 to the manual 69e7bfc4-9823-42fc-b9c6-362f5d3d8f24

2015-02-03

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Page Count: 9

ELSTAT TRAINING BOOKLET
GDM SERIES COOLER EQUIPPED WITH EMS (ELSTAT) CONTROL
GDM-26
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
2
ELSTAT SEQUENCE OF OPERATION
Once the cabinet is plugged in, the ELSTAT control will ash "888" and then
go through a parameter check. Once completed, the control will do a "soft
start". Lights come on rst, 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 o at the predetermined temp (Model specic).
The whole time the controller is on it is learning the customer trac. 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 trac is nonexistent. It will display (---). It cycles the
compressor to hold about 50˚F. It shuts the lights o and cycles the evap
fan motor. It will hold this pattern until roughly 2 hours before customer
trac is predicted to start. The controller will then switch into the "use"
mode. Cycling the compressor on and o based on temperature (Approx
36˚F to 38˚F product temp). Running lights continuously. The controller will
then cycle between these two modes.
3
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GDM-10 through GDM-37
Probe is in return air mounted by the evaporator fan motor.
Probe Location 1
GDM-45 to GDM-72
Probe is in the discharge air stream
O of the Evaporator Coil
(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
&-45"5$0.10/&/54
ProbeTransformer
Controller
1
2
3
4
5
6
7
8
9
Probe Location 2
Evaporator Coil Evaporator Fan
Elstat
Airow
1
2
3
4
5
6
7
8
9
Evaporator Coil Evaporator Fan
Elstat
Airow
4
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(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
'30/57*&80'&-45"5
Waterdrops Snowake Up/Down Key
Perishable Mode Light
5
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/0 /".&
1. Line In
2. Lights
3. Not Used
4. Appliance Sensor
5. Compressor
6. Fan (s)
7. 12 Vac
8. Not Used
9. Not Used
(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
3&"37*&80'$0/530--&3
    
   
6
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(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
FREQUENTLY ASKED QUESTIONS
t1VTIUIFTFUCVUUPOLFZMPPLTMJLFBTOPXGMBLFUIFTDSFFOTIPVMETIPX1"4
t:PVXJMMOPXOFFEUPFOUFSUIFLFZEBODF
t1SFTTUIFTOPXGMBLFLFZCFFQT
t1SFTTUIFVQBSSPXLFZCFFQT
t1SFTTUIFEPXOBSSPXLFZCFFQ
t1SFTTUIFXBUFSESPQTLFZCFFQTTIPVMETIPXEJTQMBZPG14
t1SFTTBOEIPMEUIFEPXOBSSPXLFZVOUJMZPVWJFX)3
t1SFTTUIFTOPXGMBLFLFZEJTQMBZTIPVMETIPX1"4
t3FFOUFSLFZEBODFBOEUIF)BMG3FTFUJTDPNQMFUF
)PXEP*QFSGPSNB)BMGSFTFUBOEXIBUJTJU Half reset clears any of the learning memory.
)PXEP*QVUDPOUSPMMFSJOUP1FSJTIBCMFNPEF 
t1FSJTIBCMFNPEFJTVTFEXIFOBOZUIJOHQFSJTIBCMFJTCFJOHTUPSFEJOUIFDBCJOFU
t*OQFSJTIBCMFNPEFDBCJOFUXJMMNBJOUBJOB¡'¡'QSPEVDUUFNQFSBUVSF5IF
cabinet will not go into standby mode.
t 1SFTTUIFTFUCVUUPOLFZMPPLTMJLFBTOPXGMBLFUIFTDSFFOTIPVMETIPX1"4
t:PVXJMMOPXOFFEUPFOUFSUIFLFZEBODF
t1SFTTUIFTOPXGMBLFLFZCFFQT
t1SFTTUIFVQBSSPXLFZCFFQT
t1SFTTUIFEPXOBSSPXLFZCFFQ
t1SFTTUIFXBUFSESPQTLFZCFFQTTIPVMETIPXEJTQMBZPG14
t/PXQSFTTBOEIPMEEPXOUIFTOPXGMBLFLFZVOUJMUIFTDSFFOTIPXT1&SBOE
t/FYUQSFTTBOEIPMEUIFVQBSSPXLFZVOUJMUIFTDSFFOTIPXT1&SBOE
t8BJUVOUJMDPOUSPMMFSSFBET64&VOQMVHUIFDBCJOFUBOEQMVHJUCBDLJO"UUIJT
point the red LED in center of the control should be “on” which means that the
control is in perishable mode.
$BOUIF&MTUBUDPNFPVUPGUIF4UBOECZNPEFCFGPSFJUTQSFEFUFSNJOFEUJNF
/P If the motion sensor is set o during the "Stand by" mode the control will automatically
turn the lights on, however it will stay in stand by mode.
$BOUIF&MTUBUCFTFUVQGPSDPOUJOVPVTVTFBOEOPUHPJOUPUIF4UBOECZNPEF
:FT 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.
/05&5IFSFJTOPBCJMJUZUPTFUMJHIUTPOBMMUIFUJNF
$BOMJHIUTCFTFUUPTUBZPOBUBMMUJNFT
/P Elstat controller does not have this capability. Lights will always turn o in "stand by"
Mode.
/05&"MM&OFSHZ4UBSDBCJOFUTBSFTIJQQFEJOQFSJTIBCMFNPEF
7
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(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
/03."-01&3"5*/($0%&4
Normal operating mode. Cabinet
should be holding proper product
temperature.
Units is in Standby mode. Control
will cycle the unit at a warmer
temperature. Lights will be o.
Units is in defrost . Compressor has
been shut o and evaporator fan
motor is running to clear any ice
that may have accumulated. This is a
predetermined program function.
Freeze up protection. This unit has
gone down below the minimum
temperature Set Point.
1PTTJCMF1SPCMFNT "DUJPOUPUBLF
Compressor not shutting o Check compressor. Relay at
controller
Faulty Probe Ohm out evaporator probe
Parameters have been
changed
Check parameter list
Refrigeration System Failure. The unit
has not satised the set point in the
amount of time allowed.
1PTTJCMF1SPCMFNT "DUJPOUPUBLF
Unit is not cooling Check the Refrigeration System
Faulty Probe Ohm out evaporator probe
Faulty Controller Bypass control to see if system will
run
Parameters have been
changed
Check the parameter list
Power supply voltage is low.
1PTTJCMF1SPCMFNT "DUJPOUPUBLF
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
Power supply voltage is too high.
1PTTJCMF1SPCMFNT "DUJPOUPUBLF
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.
Probe failure
1PTTJCMF1SPCMFNT "DUJPOUPUBLF
Connector o at controller Verify that connector 4 is in place
(see page 2)
Probe is open Ohm out probe
Probe is shorted Ohm out probe
Probe wire is open Ohm out probe wire
Elstat Probes by the evaporator motor GDM-10 to 33 probes in air
stream GDM-35 to 72
7BMVF 0INT
¡ 32,000 Ohms
¡ 12,000 Ohms
¡ 9,300 Ohms
¡ 8,500 Ohms
¡ 7,000 Ohms
'"6-5$0%&45306#-&4)005*/(
8
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5306#-&4)005*/((6*%&
(Please note this does not cover any and all situations)
$PNQMBJOU 1PTTJCMF$BVTF 3FQBJS
$BCJOFUOPUDPMEFOPVHI 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
location. Elstat control may be
going in standby mode.
2. Move cabinet or put into
Perishable mode.
3. Unit was in a previous
location.
3. Perform half reset.
8BSN1SPEVDU 1. Unit in a unpredictable
location. Elstat control may be
going into standby mode.
1. Move cabinet or put into
Perishable 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.
6OJUEJTQMBZJOHB
UFNQFSBUVSFJOTUFBEPG
iVTFw
1. Unit recently worked
on. Parameters have been
changed.
1. Reset the DIS parameter to
“0”.
(%.4&3*&4$00-&3&26*11&%8*5)&.4&-45"5$0/530-
5306#-&4)005*/((6*%&
9

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