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Fridge Control System
The Eco medical fridge is controlled in three stages:
(Optional) Voltage Stabiliser Board [PCB version 4.1; Part number: RMS97748892]
At cold start (switched on after long time), if the supply voltage is within operating range,
output starts within 3-4 seconds and LED stabilises.
At warm start (switched on immediately after switching off), if the supply voltage is within
operating range, output starts within 180 seconds and LED stabilises.
The stabiliser can provide output voltage to suit the compressor.
Medical Fridge Controller [PCB Version 4.1; S/W Version 2.22T Part no: 97748899]
The controller uses one sensor inside the water tank to decide when to switch the
compressor ON and OFF.
S1 Temp.
³
-0.5
£ -1.0
No drop after 6 hours of running
Compressor Starter Relay
The relay (PTC type) briefly connects a second winding in the compressor to start the
compressor motor.
There is also temperature and current sensitive OLP which protects the motor from
overheating and high current.
If the controller is supplying power but the compressor is not running the starter is faulty or
the compressor has got too hot and needs to cool down.
Technician's instruction manual: GVR 51 Lite - Godrej Vaccine Refrigerators
Action
After 15 minutes, switch on compressor
After 15 minutes, switch off compressor
Error LED lights. Buzzer sounds for 1 minute, for every
30 mins. Compressor ON for 7 min every 22 mins.
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