II.13 CHECKLIST
1 – COMPRESSOR: IT DOES NOT START
There are power supply problems:
The connection cable is loose:
Faulty control panel:
Compressor malfunction:
2 - COMPRESSOR: IT WORKS INTERMITTENTLY
Faulty low pressure switch:
Insufficient amount of refrigerant fluid:
Excessive amount of refrigerant fluid:
Irregular operation of the expansion valve:
Poor water circulation in the hydraulic system:
3 - COMPRESSOR: IT WORKS NOISILY-INTERMITTENTLY
The compressor is pumping liquid, excessive refrigerant fluid in crankcase:
Mechanical problems in the compressor:
Unit running at the limit of the specified conditions of use:
4 - FAN: IT WORKS NOISILY-INTERMITTENTLY
The fixing screws are loose:
The blades touch the framework or the protection grille:
Irregular fan operation:
5 - THE CIRCULATION PUMP DOES NOT START OR IT WORKS ANOMALOUSLY
No voltage to the pump unit:
Pump blocked:
Pump motor malfunction:
Air in the hydraulic circuit:
6 – THE UNIT DOES NOT HEAT UP ALTHOUGH THE COMPRESSOR WORKS
Refrigerant leak:
Compressor malfunction:
7 – LOW WATER HEATING EFFICIENCY
Poor pipe insulation:
Poor heat exchange in the evaporator:
Low amount of refrigerant in the unit:
Blocked water side heat exchanger:
PROBLEM
RECOMMENDED ACTION
the phase sequence has been inverted.
check and fix.
identify the problem and solve it.
replace the compressor.
check pressure switch calibration and operation.
1 - detect and eliminate any leaks;
2 - restore the correct amount.
drain the excess.
check operation.
1 - the circuit is blocked or air is getting in.
2 - check that the pump and expansion valve work correctly.
3 - clean the water filter.
1 - check operation of the expansion valve;
2 - check overheating;
3 - adjust overheating, replace the expansion valve if required.
replace the compressor.
check unit operating limits.
tighten the screws correctly.
analyse the problem and fix it.
replace the fan.
check the electrical connections.
unblock the pump.
replace the pump.
bleed the circuit.
Refrigerant leak:
Compressor malfunction:
increase circuit isolation.
clean the evaporator.
check for leaks
clean or replace the heat exchanger.
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ELECTA-ECO