List Of Alarm Codes - Mitsubishi Heavy Industries TU1250SAE Operation Manual

List of alarm codes

Alarm
Code
Magnet clutch
fuse break
1
Throttle solenoid
fuse break
2 Load drive circuit
fuse break
Commercial power
supply defective
3
HP abnormally high
Td abnormally high
4
Refrigerant
shortage
LPT failure
5
HPT failure
6 Engine coolant
temperature high
Engine speed
abnormally low
7
Engine start
failure
Engine speed
abnormally high
8 Unit panel not
close
OCR tripped
9
Alternator
generation not
enough
HTS tripped
(Option)
1 0
ECS abnormally
high
*This alarm cannot be reset because it could result in a fire. When this alarm has occurred,
contact a dealer.
Trouble
Fuse F3 has blown. Replace fuse F3 (10 A) in the
control box. If trouble persists after replacement,
ask a dealer for inspection.
Fuse F9 has blown. Replace fuse F9 (30 A) in the
control box. If trouble persists after replacement,
ask a dealer for inspection.
Fuse F2 has blown. Replace fuse F2 (15 A) in the
control box. If trouble persists after replacement,
ask a dealer for inspection.
Commercial power supply is in failure or
disconnected. Check the power supply.
High-pressure switch has tripped.
(1) Open the front panel and inspect the condenser
fan drive system for any abnormality.
(2) Check to see if the condenser coil is fouled
heavily. If so, cleanse it with water.
(High-pressure cleansing is prohibited.)
Refrigerant temperature at the compressor discharge side
has reached the protective temperature. Consult a dealer.
Refrigerant quantity is extremely low.
Ask a dealer for inspection.
Refrigerant pressure at compressor suction side has
dropped to the protective pressure, or low-pressure sensor
is in failure. Ask a dealer for inspection.
High-pressure sensor is in failure.
Ask a dealer for inspection.
Engine water temperature switch has tripped. Inspect the
water quantity in the reservoir tank and replenish if
necessary. Also inspect and clean the radiator (heat
exchanger placed at right as seen facing the refrigerationnit).
Engine speed is extremely low.
Ask a dealer for inspection
Inspect the fuel tank to see if fuel is reserved.
If fuel is reserved, inspect the battery.
Engine speed has increased far beyond the
setting value. Ask a dealer for inspection.
Front panel of condensing unit is open. Close
the panel completely.
Motor over-current protection device has
tripped. Ask a dealer for inspection.
Power generation signal from the alternator is not
detected. When the unit operation has been stopped
due to this error, ask a dealer for inspection.
Electric heater protection device has tripped.
Ask a dealer for inspection.
Engine clutch overheat prevention device has tripped.
Ask a dealer for inspection.
Countermeasure
- 75 -
Alarm Unit
Lamp Condition
On
Unit stops.
Unit operation continues.
(Emergency
Blinking
operation with low
engine speed only)
On Unit stops.
Unit stops.
Blinking
(Automatic operation
resume)
On
Unit stops.
Unit stops.
Blinking
(Automatic operation
resume)
Unit stops.
On
On Unit stops.
Blinking
Unit stops.
On Unit stops.
Unit stops.
(Automatic operation
On
resume repeats up
to 9 times.)
Unit stops.
On
On
Unit stops.
Unit stops.
Blinking
(Automatic operation
resume)
Unit stops.
(Automatic operation
On
resume repeats up
to 2 times.)
Blinking
Unit operation
(or On with
continues.
battery
(Unit stops if battery
voltage drop)
voltage is low.)
Unit stops.
(Automatic
Blinking
operation
resume)
Unit* stops.
On