Mitsubishi Electric MXZ-2D33VA-E1 Service Manual page 74

Indication
No. Symptom
LED1(Red) LED2(Yellow)
Outdoor unit
operates.
20 5 times Lighted
21 8 times Lighted
Outdoor unit
22 9 times
Lighted
operates
normally.
23
Lighted Lighted
NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.6.
2. LED is lighted during normal operation.
The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) The flashing frequency is "2".
ON
OFF
OBH626B
Abnormal point / Condition
Cooling high-pressure
The outdoor heat exchanger temperature exceeds 58°C during operation.
protection
Converter protection
A failure is detected in the operation of the converter during operation.
The connector of compressor is disconnected.
Inverter check mode
Inverter check mode starts.
Normal
2.5-second OFF
Condition
-
0.5-second ON
2.5-second OFF
74
Remedy
This symptom does not mean any abnormality of the
product, but check the following points.
• Check if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
• Check the voltage of power supply.
• Replace the inverter P.C. board.
-
-
Outdoor display P.C. board (Parts side)
Lighted
0.5-second ON
LED1 LED2