J&M CellarPlus 70-S1/S3, Техническое руководство

Страница: 18 / 32

Issue: 01.06.2023 Page 15
FAULT POSSIBLE CAUSE CHECK SOLUTION
Indoor Fan not
running
Is rocker switch on unit switched
on? If not - switch on
Motor fault Is there correct voltage at
motor terminals? If yes - motor faulty. Replace motor
If no - check supply / wiring connections
Check fan capacitor Replace as required
No display on
controller Power supply Is power switched on? If not - switch on
Is rocker switch on unit switched
on? If not - switch on
Is there correct voltage at
controller If yes - controller faulty. Replace
controller
If no - check supply / wiring connections
Power to
controller but no
cooling from unit Is unit in defrost mode? Check if defrost LED is
displayed If yes - all OK. Wait for defrost to end
If no - further checks required
Is unit in cooling mode
(cooling LED displayed) Is room at required
temperature? All OK
Room above required
temperature? Further checks required
Reduced airflow Fan motor Is fan rotating slowly? Further checks required on fan (see
above)
Air inlets blocked Is anything blocking air inlet
grilles at side of unit Clear items from around unit
Evaporator coil dirty Check condition of coil Clean as necessary
Evaporator coil iced up Switch off unit and allow to
defrost Checks required to determine cause of
icing
SYSTEM
Insufficient
cooling Lack of refrigerant Is sight glass flashing
continuously? Leak test system and top up with
refrigerant
Condenser coil dirty Visual check of coil condition Clean condenser coil
Lack of ventilation to unit Any obstructions around unit? Clear same to ensure good ventilation
Evaporator coil dirty Visual check of coil condition Clean evaporator coil
System settings Controls (inc thermostat) set
correctly? Adjust as necessary
T.E.V. Superheat Adjust as necessary
Service valves not open
correctly Are valves fully open? Adjust as necessary
Restriction in
piping/component Is the filter drier blocked?
Sweating/frosting on outlet of
drier indicates a blockage Replace filter drier
Damage to piping Replace piping as required
Head pressure
too high Condenser coil dirty Visual check of coil condition Clean condenser coil
System overcharged with
refrigerant Is head pressure high but liquid
line cool to touch? Reclaim refrigerant/recharge correctly
Condenser fan not
running See above (fan will not run) See above
Lack of ventilation to unit Any obstructions around unit? Clear same to ensure good ventilation
System load too high
(overstocked, door open
on coldroom) Reduce loading