Hitachi Utopia RPI-2.5HRG - Page 19

1-16
TROUBLESHOOTING
(1.1.6 Abnormalities of Devices)
Cause Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Cooling or
Heating
Operation
with
Abnormal
Sound
Abnormal Sound from
Inside of Compressor
Replace compressor.
Wear or
Breakage of
Internal
Comp. Parts
Check expansion valve
opening.
Check each part is
tightly fixed.
Abnormal
Sound from
Compressor
Faulty
Installation
Tightly fix it.
Ensure superheat.
Liquid Ref.
Compression
Check it by viewing.
Remove foreign
particles.
Foreign Particles Inside
of Fan Casing
Check it by viewing.
Adjust position of
fan runner.
Indoor Unit Fan Runner
is Hitting Casing
Check it by viewing.
Adjust position of
propeller fan.
Outdoor Unit Propeller Fan
is Hitting Shroud
Check surface of
contacts.
Replace magnetic
switch.
Hamming Sound from
Magnetic Conductor
Check each fixing
screws.
Tightly fix it.
Abnormal Vibration of
Cabinets