Mitsubishi Electric MXZ-2C30VA Service Manual page 80

Indication
Symptom
No.
LED1(Red) LED2(Yellow)
Outdoor unit
operates.
20
Once Lighting
Twice Lighting
21
22
Lighting
3 times
4 times Lighting
23
5 times Lighting
24
Outdoor unit
25 9 times
operates Lighting
normally.
Lighting Lighting
26
NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.
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) When the flashing frequency is "2".
ON
2.5-second OFF
OFF
Abnormal point / Condition
The primary current exceeds 15 A (MXZ-3C54/3C68/4C71VA)/
Primary current protection
17 A (MXZ-4C80VA)/18 A (MXZ-5C100VA).
The current of the compressor exceeds 12 A (MXZ-3C54VA) /12.5A
Secondary current protection
(MXZ-3C68/4C71VA) /10 A (MXZ-4C80/5C100VA).
High-pressure protection
The indoor gas pipe temperature exceeds 45°C during heating.
Defrosting in cooling The indoor gas pipe temperature falls 3°C or below during cooling.
Discharge temperature
The discharge temperature exceeds 100°C during operation.
protection
The frequency of the compressor is kept 80 Hz or more and the discharge
Low discharge
temperature is kept under 50°C (cooling) /40°C (heating) for more than
temperature protection
40 minutes.
Cooling high-pressure
The outdoor heat exchanger temperature exceeds 58°C during operation.
protection
Inverter check mode The unit is operated with emergency operation switch.
Normal
0.5-second ON
2.5-second OFF
Condition
-
0.5-second ON
80
Remedy
These symptoms do not mean any abnormality of the
product, but check the following points.
• Check indoor filters are not clogged.
• Check there is sufficient refrigerant.
• Check indoor/outdoor unit air circulation is not short cycling.
• Check refrigerant circuit and refrigerant amount.
• Refer to 11-6. "Check of LEV".
• Refer to 11-6. "Check of outdoor thermistors".
• Refer to 11-6. "Check of LEV".
• Check refrigerant circuit and refrigerant amount.
This symptom does not mean any abnormality of the
product, but check the following points.
• Check indoor filters are not clogged.
• Check there is sufficient refrigerant.
• Check indoor/outdoor unit air circulation is not short cycling.
-
-
Outdoor electronic control P.C. board(Parts side)
MXZ-3C54/3C68/4C71VA
Lighting
MXZ-4C80/5C100VA
Lighting
LED2 LED1
LED1 LED2