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Please note we are not able to provide support for old or obsolete models of our solutions. All of our supported solutions are listed above. For those maintaining or managing Nexo solutions on behalf of customers, please note that support queries should be raised via those customers.
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 flash '888' 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 continuously. The controller will then cycle between these two modes.
(%. 4&3*&4 $00-&3 &26*11&%8*5) &.4 &-45'5 $0/530-
&-45'5$0.10/&/54
Controller
Transformer | Probe |
Evaporator Fan | Evaporator Fan |
Evaporator Coil | Evaporator Coil |
Airflow | Airflow |
Elstat
1 | |
9 | |
2 | |
8 | |
3 | |
7 | |
4 | |
6 | 5 |
Probe Location 1
GDM-10 through GDM-37
Probe is in return air mounted by the evaporator fan motor.
Probe Location 2
GDM-45 to GDM-72
Probe is in the discharge air stream
Off of the Evaporator Coil
4 &BTU5FSSB -BOF t 0h'BMMPO .0 t QI t UPMM GSFF t TFSWJDF!USVFNGH DPN
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'30/57*&8 0' &-45'5 | |||
Perishable Mode Light | |||
Waterdrops | Snowflake | Up/Down Key | |
&BTU5FSSB -BOF t 0h'BMMPO .0 t QI t UPMM GSFF t TFSWJDF!USVFNGH DPN | 5 |
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3&'37*&8 0' $0/530--&3 | |||||
/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 | ||||
6 | &BTU5FSSB -BOF t 0h'BMMPO .0 t QI t UPMM GSFF t TFSWJDF!USVFNGH DPN |
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FREQUENTLY ASKED QUESTIONS
$BO UIF &MTUBU DPNF PVU PG UIF 4UBOE CZ NPEF CFGPSF JUT QSFEFUFSNJOFE UJNF
/P 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.
$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 off in 'stand by' Mode.
)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.
/05& 'MM &OFSHZ 4UBS DBCJOFUT BSF TIJQQFE JO QFSJTIBCMF NPEF
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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.
)PX EP * QFSGPSN B )BMG SFTFU BOE XIBU JT JU Half reset clears any of the learning memory.
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
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/03.'- 01&3'5*/( $0%&4
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.
Freeze up protection. This unit has gone down below the minimum temperature Set Point.
Refrigeration System Failure. The unit has not satisfied the set point in the amount of time allowed.
1PTTJCMF 1SPCMFNT | 'DUJPO UP UBLF | |||
Compressor 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. | ||||
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 | ||||
Probe failure | ||||
1PTTJCMF 1SPCMFNT | 'DUJPO UP UBLF | |||
Connector off 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 |
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 | Check the parameter list |
changed |
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. |
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 |
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5306#-&4)005*/( (6*%&
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 | 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. | ||
8BSN 1SPEVDU | 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. | ||
6OJU EJTQMBZJOH B | 1. Unit recently worked | 1. Reset the DIS parameter to |
UFNQFSBUVSF JOTUFBE PG | on. Parameters have been | “0”. |
iVTFw | changed. |
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