Phau Ntawv Qhia

WSV6 VERTICAL SERIES - IOM
WSV6 Vertical Series – IOM 61
TROUBLESHOOTING CONTINUED
PROBLEM
POSSIBLE CAUSE
CHECKS & CORRECTIONS
UNIT SHORT
CYCLES
Unit oversized
Recalculate heating and cooling loads.
Thermostat
Thermostat installed near a supply air register, relocate thermostat.
Check heat anticipator.
Wiring and controls
Loose connections in the wiring or a defective compressor
contactor.
INSUFFICIENT
COOLING OR
HEATING
Unit undersized
Recalculate heating and cooling loads. If not excessive, possibly
adding insulation will rectify the situation.
Loss of conditioned air by
leaks
Check for leaks in ductwork or introduction of ambient air through
doors or windows.
Airflow
Lack of adequate airflow or improper distribution of air. Replace
dirty air filter.
Refrigerant charge
Low on refrigerant charge causing inefficient operation.
Compressor
Check for defective compressor. If discharge is too low and suction
pressure is too high, compressor is not pumping properly. Replace
compressor.
Reversing valve
Defective reversing valve creating bypass of refrigerant from
discharge to suction side of compressor. Discharge is too low and
suction is too high. Replace reversing valve.
Operating pressures
Compare unit operating pressures to the pressure / temperature
chart for the unit.
Refrigerant metering
device
Check for possible restriction or defect. Replace is necessary.
Moisture, non-
condensables
The refrigerant system may be contaminated with moisture or non-
condensables. Reclaim refrigerant, evacuate and recharge with
factory recommended charge. Replace filter dryer.
Table 29 – Troubleshooting Table Continued