Troubleshooting - Payne PA1R Series Installation, Start-Up And Service Instructions Manual

Refer to Troubleshooting Tables 19-21 and Fig. 36 for additional information.
PROBLEM
Compressor and Power failure.
condenser fan will
Fuse blown or circuit breaker tripped.
not start.
Defective thermostat, contactor, transformer, or control
relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
Compressor will not Faulty wiring or loose connections in compressor
start but condenser circuit.
fan runs.
Compressor motor burned out, seized, or internal
overload open.
Defective run/start capacitor, overload, start relay.
One leg of three-phase power dead.
Compressor cycles Refrigerant overcharge or undercharge.
(other than normally
satisfying
Defective compressor.
thermostat).
Insufficient line voltage.
Blocked condenser.
Defective run/start capacitor, overload, or start relay.
Defective thermostat.
Faulty condenser-fan motor or capacitor.
Restriction in refrigerant system.
Compressor operates Dirty air filter.
continuously.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor.
Air in system.
Condenser coil dirty or restricted.
Compressor makes Compressor rotating in wrong direction.
excessive noise
(PA1R072 scroll
only).
Excessive head Dirty air filter.
pressure.
Dirty condenser coil.
Refrigerant overcharged.
Air in system.
Condenser air restricted or air short-cycling.
Head pressure too Low refrigerant charge.
low.
Compressor valves leaking.
Restriction in liquid tube.
Excessive suction High head load.
pressure.
Compressor valves leaking.
Refrigerant overcharged.
Suction pressure too Dirty air filter.
low.
Low refrigerant charge.
Metering device or low-side restricted.
Insufficient evaporator airflow.
Temperature too low in conditioned area.
Outdoor ambient below 25 F.
Evaporator fan will Time off delay not finished.
not shut off.
(Sizes 036-060 only.)

TROUBLESHOOTING

Table 19 — Cooling Service Analysis
CAUSE
—29—
REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room temperature.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker. Determine cause.
Recover refrigerant, evacuate system, and recharge to
nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak; repair and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and recharge.
Clean coil or remove restriction.
Reverse the 3-phase power leads as described in
Start-Up section on page 24.
Replace filter.
Clean coil.
Recover excess refrigerant.
Recover refrigerant, evacuate system, and recharge.
Determine cause and correct.
Check for leaks; repair and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter.
Check for leaks; repair and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if
necessary.
Reset thermostat.
Install low-ambient kit.
Wait for 30-second off delay.