Trouble Shooting - York Mr. Slim PK-1.6FLA Technical & Service Manual

Trouble Shooting

TROUBLE SHOOTING CHART FOR DUCTABLE SPLIT TYPE
AIR-CONDITIONERS
If your unit does not operate or cooling enough refer to the Chart below and check before
calling a Service Engineer.
PROBLEM
Compressor and
condenser fan will not
start.
Compressor will not
start but condenser fan
runs.
Compressor cycles (other
than normally satisfying
thermostat).
Compressor operates
continuously.
Excessive head
pressure.
Head pressure too low.
Excessive suction
pressure.
38 COMMERCIAL DUCTED SPLITS
CAUSE
Power failure.
Fuse blown or Circuit Breaker tripped.
Defective thermostat, contactor,
transformer or control relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
Faulty wiring or loose connections in
compressor circuit.
Compressor motor burned out, seized, or
internal over load open.
Defective run/start capacitor, overload start
relay.
One leg of three-phase power dead.
Refrigerant overcharge or undercharge.
Defective compressor.
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.
Dirty air filter.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor
Air in system.
Condenser coil dirty or restricted.
Dirty air filter.
Dirty condenser coil.
Refrigerant overcharged.
Air in system.
Condenser air restricted or air short-
cycling.
Low refrigerant charge.
Compressor valve leaking.
Restriction in liquid tube.
High head load.
Compressor valves leaking.
Refrigerant overcharged.
REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine the cause and replace.
Check wiring diagram & rewire correctly.
Lower thermostat setting below
room temperature.
Check wiring and repair or replace.
Determine cause, replace compressor.
Determine the cause and replace.
Replace fuse or reset circuit breaker.
Reclaim refrigerant, evacuate system,
and recharge to nameplate.
Determine the cause and replace.
Determine cause and correct.
Determine cause and correct.
Determine the 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.
Reclaim refrigerant, evacuate, & recharge.
Clean coil or remove restriction.
Replace air filter.
Clean coil.
Reclaim excess refrigerant.
Reclaim refrigerant,
evacuate & recharge.
Determine cause and correct.
Check for leaks; repair and recharge.
Replace compressor.
Reclaim excess refrigerant.
Check for source and eliminate.
Replace compressor.
Reclaim excess refrigerant.