Mitsubishi Heavy Industries TU1250SAE Operation Manual page 82

Alarm
Code
Defrost SV failure
(Zone X)
1
(Multiple
specification)
Condenser inlet SV
failure
Liquid bypass SV
2
failure
EEV failure
Receiver
pressurizing SV
failure
3
Buzzer failure
Stop solenoid&
relay failure
4
Starter relay
circuit failure
ARMO circuit
failure
Pre-heater relay
5
circuit failure
Electic heater relay
failure (Option)
6
Fuel pump failure
ECS failure
7
Battery voltage low
Evaporator fan
motor fuse break
8
Economizer SV
failure
Engine hot water
SV failure (Option)
9
WP failure
1 0
Trouble
Defrost solenoid valve (SV2-A, -B or -C) has
failed.
Ask your service agent to inspect.
Condenser inlet solenoid valve (SV4) has failed.
Ask a dealer for inspection.
Liquid bypass solenoid valve (SV5) has failed.
Ask a dealer for inspection.
Electronic expansion valve EEV-A (EEV-A, B or C for
the multiple specification) has failed.
Ask a dealer for inspection.
Receiver pressurizing solenoid valve (SV7) has failed.
Ask your service agent to inspect.
External buzzer circuit is shorted.
Ask a dealer for inspection.
Stop solenoid circuit is disconnected or shorted.
Ask a dealer for inspection.
Drive coil circuit of starter relay (SR) is discon-
nected or shorted. Ask a dealer for inspection.
Drive coil circuit of motor relay (ARMO) is
disconnected or shorted. Ask a dealer for inspection.
Drive coil circuit of pre-heater relay (ARPH) is
disconnected or shorted. Ask a dealer for inspection.
Drive coil circuit of evaporator electric heater relay A (A, B or
C for the multiple specification) is disconnected or shorted.
Ask a dealer for inspection.
Fuel pump has failed.
Ask a dealer for inspection.
Engine clutch temperature sensor is disconnect-
ed or shorted.
Ask a dealer for inspection.
Battery voltage has dropped.
Replace the battery if aged.
One of fuses F5, 6, 7 and 8 (or 13, 14, 15 and 16)
is blown. Replace the blown fuse (15 A) in the
control box.
If the trouble persists after replacement, ask a
dealer for inspection.
Economizer solenoid valve (SV8) has failed.
Ask a dealer for inspection.
Hot water solenoid valve WSV-A (WSV-A, -B or
-C for the multiple specification) has failed.
Ask your service agent to repair.
Hot water pump relay has failed.
Ask your service agent to inspect.
Countermeasure
- 77 -
Alarm Unit
Lamp Condition
Unit stops.
On
On
Unit stops.
On or
Unit operation continues.
blinking (Operation stops at PTI.)
On Unit stops.
Unit operation
Blinking
continues.
Unit stops.
On or
(Operation continues
blinking
partially.)
Unit stops.
On
On Unit stops.
On Unit stops.
Unit stops.
On
Unit operation
Blinking
continues.
On Unit stops.
Unit operation
Blinking
continues.
Unit stops.
On or
(Operation continues
blinking
partially.)
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.