eNeRGy-IOM-2020.12-EN
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60
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REFRIGERATION
FAULT
POSSIBLE CAUSE AND SYMPTOMS
SOLUTION
HP FAULT
Incorrect airflow rates
Heat pump mode:
Check the filter before the indoor coil measure
and estimate the airflow rate increase the
speed of the fan
Cooling mode:
Check the condenser fan
Moisture or contaminants in the system
Summer operation
Several hours after the unit has stopped, check
for
the
presence
of
non-condensable
substances
Moisture or contaminants in the system
Condenser coil is obstructed
If the circuit pressure is higher (<1bar) than the
saturated pressure corresponding to the
measured outdoor temperature, there is
possibility that some contaminants are present
in the system.
Reclaim the refrigerant, and vacuum the circuit
(For flammable refrigerant, please follow the
procedure described in the manual) Recharge
the unit
Check the condenser coil and clean is necessary
Recycled Hot Air
Check clearance around the condenser
Strong variations of pressure (2 to
3 bars). Expansion valve “hunting”
Incorrect adjustment of the expansion valve Refer to the LP FAULT section
Low refrigerant charge
Repair the leak and fill with liquid
The pressure regulator is not sufficiently
supplied with liquid
Refer to the LP FAULT section
Increase subcooling
Very high discharge temperature,
High
amps
measured
at
compressor
Very high superheat, very hot compressor
Reduce the superheat on the expansion valve.
Check the pressure drop on the filter drier in
the suction line
Four Way reversing valve possibly blocked,
abnormal noise from the valve, low LP and
increasing HP
Check the operation of the valve by going
through cycle inversions. Change if necessary.
Refer to LP FAULT
MAINTENANCE DIAGNOSTIC
MAINTENANCE DIAGNOSTIC
Summary of Contents for E014AH055FM2M
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