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WSV6 VERTICAL SERIES - IOM
60 WSV6 Vertical Series – IOM
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
CHECKS & CORRECTIONS
ENTIRE UNIT
DOES NOT RUN
Power supply off
Apply power; close disconnect.
Blown Fuse
Replace fuse or reset circuit breaker. Check for correct fuses.
Voltage supply low
If voltage is below minimum voltage specified on unit dataplate,
contact lower power company. (Fault Code – Ou & 17).
Thermostat
Set the fan to “ON”, the fan should run. Set thermostat to “COOL” and
lowest temperature setting, the unit should run in the cooling mode
(reversing valve energized). Set unit to “HEAT” and the highest
temperature setting, the unit should run in the heating mode. If
neither the blower nor compressor run in all three cases, the
thermostat could be mis-wired or faulty. To ensure mis-wired or faulty
thermostat verify 24 volts is available on the condenser section low
voltage terminal strip between “R” and “C”, “Y” and “C”, and “O” and
“C”. If blower does not operate, verify 24 colts between terminals “G”
and “C” in the air handler. Replace the thermostat if defective.
BLOWER
OPERATES BUT
COMPRESSOR
DOES NOT RUN
Thermostat
Check setting, calibration and wiring.
Wiring
Check for loose or broken wires at compressor, capacitor or
contractor.
Safety Controls
Check control board fault LED for fault code.
Compressor overload open
If the compressor is cool and the overload will not reset, replace the
compressor.
Compressor motor
grounded
Internal wiring grounded to the compressor shell. Replace compressor.
If compressor burnout, install new filter dryer.
Compressor windings open
After compressor has cooled, check continually of compressor
windings. If the windings are open, replace the compressor.
UNIT OFF ON
HIGH PRESSURE
CONTROL
FAULT CODE 12
Discharge pressure too
high
In “COOLING” mode: Lack of or inadequate water flow. Entering water
temperature too warm. Scaled or restricted water to refrigerant heat
exchanger.
In “HEATING” mode: Lack of or inadequate water flow. Entering water
temperature too cold. Scaled or restricted water to refrigerant heat
exchanger.
Refrigerant charge
The unit is overcharged with refrigerant. Reclaim refrigerant, evacuate
and recharge with factory recommended charge.
High pressure switch
Check for defective or improperly calibrated high pressure switch.
UNIT OFF ON
LOW PRESSURE
CONTROL
FAULT CODE 13
Suction Pressure too low
In “COOLING” mode: Lack of or inadequate airflow. Entering air
temperature too cold. Blower inoperative, clogged filter or restriction
in ductwork.
In “HEATING” mode: Lack of or inadequate water flow. Entering water
temperature too cold. Scaled or restricted water to refrigerant heat
exchanger.
Refrigerant charge
The unit is low on refrigerant. Check for refrigerant leak, repair,
evacuate and recharge with factor recommended charge.
Low pressure switch
Check for defective or improperly calibrated low pressure switch.
Table 28 – Troubleshooting Table