Mitsubishi Heavy Industries TU1250SAE Operation Manual page 81

Alarm
Trouble
Code
TH sensor failure
Throttle solenoid
failure
HPS failure
Td sensor failure
OPS failure
OCR failure
Controller
communication failure
R/L1 phase loss
(Standby)
DCS fuse break
Drain hose heater
fuse break
Pump down failure
Engine low speed
failure
Engine high speed
failure
Engine stall
EVT sensor failure
THD sensor failure
ATS sensor failure
Defrost SV failure
Countermeasure
Return air temperature sensor A (A, B or C for the
multiple specification) is disconnected or shorted.
Ask a dealer for inspection.
Engine cannot operate at high speed due to
failure on throttle solenoid.
Ask a dealer for inspection.
High-pressure switch has failed.
Ask a dealer for inspection.
Discharge gas temperature sensor is disconnected or shorted.
Ask a dealer for inspection.
Engine oil pressure switch has failed.
Ask a dealer for inspection.
Motor over-current protection device has failed.
Ask a dealer for inspection.
Controller cannot communicate properly.
Ask a dealer for inspection.
L1-phase of commercial 3-phase power supply is
open-phased (no current). (When L2 or L3 phase has
open-phased, no error occurs but the motor does not rotate.)
Ask for inspection on electric power supply.
Fuse F10, 11 or 12 has blown.
Replace the fuse F10, 11 or 12 (10 A) in the
control box. If the same trouble persists after
replacement, ask a dealer for inspection.
Fuse F4 (F4, F16 or F17 for the multiple
specification) is blown. Replace the blown fuse
(10 A) in the control box. If it persists even after
replacement, ask your service agent to inspect.
Pump down error has been detected during self
diagnosis operation (PTI operation).
Engine low speed is extensively deviated from
the rated speed.
Ask a dealer for inspection.
Engine high speed is extensively deviated from
the rated speed.
Ask a dealer for inspection.
Engine stalls frequently. Check if fuel exists in
the fuel tank. If fuel exists, ask a dealer for
inspection.
Evaporator outlet temperature sensor A (A, B or C for
the multiple specification) is disconnected or shorted.
Ask a dealer for inspection
Supply air temperature sensor A (A, B or C for the
multiple specification) is disconnected or shorted.
Ask a dealer for inspection
Ambient air temperature sensor is disconnected or shorted.
Ask a dealer for inspection.
Defrost solenoid valve SV2 (SV2-M for the multiple
specification) has failed.
Ask a dealer for inspection.
- 76 -
Alarm Unit
Lamp Condition
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit stops.
Blinking
(Automatic operation
resume)
Unit operation
Blinking
continues.
On
Unit stops.
On
Unit stops.
Unit stops.
(Automatic operation
On
resume repeats up to 9
times.)
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
On Unit stops.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
On Unit stops.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit operation
Blinking
continues.
Unit stops.
On
1
2
3
4
5
6
7
8
9
1 0