Troubleshooting; Malfunctions Of Air Conditioner - Mitsubishi Electric R410A Technical Manual

Troubleshooting

12. Troubleshooting
Infrared signal receiver
Operation lamp
Type
Room temp. sensor error
Evaporator temp. sensor error
Condenser temp. sensor error
Water pump temp. sensor error
The PRO terminal on PCB of
indoor unit without connected to
grounding wire
EEPROM error
Condensing water level full error
Note:
OPT. Light: operation light;
DEF. Light: defrosting light;

13.1 Malfunctions of air conditioner

If any of the following malfunctions occur, stop operation of the air conditioner immediately. Turn off the power
switch, and contact the local after sales service center of manufacturer:
 The RUN lamp flashes quickly (2 flash per second).
 After turning off the power switch and then turning it on again, the RUN lamp still flashes quickly.
The receiving function of the remote controller fails, or the start/ shutdown operation is abnormal.

 The fuse blows out frequently, or the circuit breaker protection occurs frequently.
 Obstacles or water enter the air conditioner.
 Condensing water leaks from indoor unit.
 Other malfunctions occur.
50
Timer lamp
PRE-DEF lamp(cooling and heating type)
or fan only lamp(cooling only type)
OPT. TME.
Light Light
-
-
- -
-
- -
TME. Light: timer light;
☆: the light flashing.
R410A Tropical Split Type Technical Manual
Manual Switch
Alarm lamp
DEF. ALARM
Light Light
- -
- -
-
-
- -
-
Remarks
Manual reset
Manual reset
Manual reset
Manual reset
Manual reset
Manual reset
Manual reset
Duct Type