Hitachi RPI-0.8FSG1 Service Manual page 32

TROUBLESHOOTING
(1.1.7 Abnormalities of Devices)
Phenomenon
Cooling or
Heating
Operation
with
Abnormal
Sound
Outdoor Fan
is Not Operated
When
Compressor
is Operated
Indoor Fan
is Not Operated
When
Compressor
is Operated
*1): Refer to TCII, SP2-K03 and SP2-L01.
1-22
Cause
Foreign Particles Inside
of Fan Casing
Indoor Unit Fan Runner
is Hitting Casing
Outdoor Unit Propeller Fan
is Hitting Shroud
Faulty
Installation
Liquid Ref.
Compression
Abnormal
Sound from
Wear or
Compressor
Breakage of
Internal
Comp. Parts
No Heating
by Oil Heater
Hamming Sound from
Magnetic Conductor
Abnormal Vibration of
Cabinets
Obstacle at Outdoor Fan
Watching Condition for
Heating Operation
Discharge Pressure Does
Not Increase Higher than
1.5MPa due to insufficient
refrigerant.
Disconnected Wiring for
Indoor Fan
Failure of AC Chopper
Check Item
Check it by viewing.
Check it by viewing.
Check it by viewing.
Check each part is
tightly fixed.
Check expansion valve
opening.
Abnormal Sound from
Inside of Compressor
Check resistance.
(Oil Heater, Fuse)
Check surface of
contacts.
Check each fixing
screws.
Check obstacles.
Wait for switching of
4-Way 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 runner.
Adjust position of
propeller fan.
Tightly fix it.
Ensure superheat.
Replace compressor.
Replace oil heater
or fuse.
Replace magnetic
switch.
Tightly fix it.
Remove obstacles.
In case that
4-Way Valve is not
switched, check for
insufficient refrigerant.
Add refrigerant. *1)
Connect wiring
correctly.
Replace AC chopper.