Mitsubishi Electric MXZ-2HA40VF-E1 Service Manual page 47

Indication
No. Symptom
LED1(Red) LED2(Yellow)
Outdoor unit
operates.
Lit
20 5 times
21 8 times
Lit
Outdoor unit
9 times
22 Lit
operates
normally.
23
Lit Lit
NOTE: 1. The location of LED is illustrated at the right figure. Refer to 12-7.4.
2. LED is lit during normal operation.
The blinking frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) The blinking frequency is "2".
ON
2.5-second OFF
OFF
OBH828B
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
0.5-second ON
2.5-second OFF
Condition
-
0.5-second ON
47
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)
Lit
LED1 LED2