York HIDS006B21S Service Manual page 66

TROUBLESHOOTING
Other
Abnormalities
Event
Cooling or
Heating
Operation
with
Abnormal
Sound
Outdoor Fan
does Not Operate
even when
Compressor
is Operating
Indoor Fan
does Not Operate
even when
Compressor
is Operating
3-44
Cause
Foreign Particles Inside
Fan Casing
Indoor Unit Fan Wheel
Contacts Casing
Outdoor Unit Propeller Fan
Comes in Contact with Fan Shroud
Failure of
Installation
Liquid Ref.
Compression
Abnormal
Sound from
Wear or
Compressor
Breakage of
Internal
Comp. Parts
Crankcase
Heater does
Not Get Warm
Humming Sound from
Magnetic Contactor
Abnormal Vibration of
Cabinets
Obstacle at Outdoor Fan
Preparatory State for
Heating Operation
Discharge pressure does Discharge pressure does
not increase higher than not increase higher than
2.2MPa due to insufficient 319 psi (2.2MPa) due to
refrigerant. insufficient refrigerant.
Disconnected Wire for
Indoor Fan
Failure of AC chopper
Abnormalities of Devices
Check Item
Check it by viewing.
Check it by viewing.
Check it by viewing.
Check each part is
Check each part is
tightly secured.
tightly fixed.
Check expansion valve
opening.
Is there any abnormal
Is there any abnormal
sound from inside of sound from Inside of
compressor?
compressor?
Check resistance of
crankcase heater or fuse.
Check surface of
contacts.
Check each fixing Check each
screws.
tightening screws.
Check obstacles.
Wait for switching of
reversing Valve.
(1 to 3 minutes)
Check operation
pressure.
Check wiring.
Check AC chopper.
Action
(Turn OFF Main Switch)
Remove foreign
particles.
Adjust position of
fan wheel.
Adjust position of
propeller fan.
Tightly secure it.
Tightly fix it.
Ensure superheat.
Replace compressor.
Replace crankcase
heater or fuse.
Replace magnetic
switch.
Tightly secure it.
Tightly fix it.
Remove obstacles.
If the reversing valve is
not switched, check for
insufficient refrigerant.
Add refrigerant.
Correctly connect wires.
Replace AC chopper.
SM-18001-rev.1