Hitachi Utopia RPI-2.5HRG User Manual

1-11
TROUBLESHOOTING
(1.1.6 Abnormalities of Devices)
Cause Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Check thermistor by
self-checking *2).
Replace or correctly
connect wiring when
it is abnormal.
Check it by
self-checking *1).
Check the indoor unit
stoppage when the
remote control switch
is switched OFF.
Failure of
Discharge
Air Temp.
Thermistor
Failure of
Thermistor
Indoor Fan
Speed is
Not Changed
No Defrosting
Operation Mode
is Available
during Heating
Operation or
Defrosting
Operation is
Continued
Light and
LCD Indication
on Remote
Control Switch
are Kept ON
Disconnected
Wire of
Thermistor
Failure of
Thermistor
for Outdoor
Evaporating
Temp. during
Heating
Failure of
Thermistor
Replace of correctly
connect when it is
abnormal.
Replace if failed.
Replace if PCB
is failed.
Disconnected
Wire of
Thermistor
Measure resistance
of coil.
Failure of
4-Way Valve
Disconnected
4-Way Valve
Coil
Enforced power supply.
Replace 4-Way valve.
Incorrect
Activation of
4-Way Valve
Check connectors.
Failure of
Outdoor Unit
PCB
Disconnected
Wires to PCB
Correctly connect
wiring.
Replace it when check
mode is not available.
Failure of
PCB
Check PCB by
self-checking *1).
Check connectors.
Failure of
Indoor Unit
PCB
Disconnected
Wires to PCB
Correctly connect
wiring.
Replace if PCB is failed.
Failure of
PCB
Failure of Remote
Control Switch
Failure of PCB for
Indoor Unit
Replace if AC
Chopper is failed.
Failure of AC Chopper
for Indoor Unit
Check connectors.
Correctly connect
wiring.
Disconnected Control Wires
between Indoor Unit and
Outdoor Unit
Failure of PCB in Indoor Unit
or Remote Control Switch
*1): Refer to Item 1.3.1 to 1.3.2.
*2): Refer to Item 1.2.3.

Hitachi Utopia RPI-2.5HRG Specifications

General

Brand	Hitachi
Model	Utopia RPI-2.5HRG
Category	Air Conditioner
Language	English