62
Primary current protection
Secondary current protection
High-pressure protection
Defrosting in cooling
3 times
Lighted
Discharge temperature
protection
• Check refrigerant circuit and refrigerant amount.
• Refer t1 11-6. "Check of LEV".
• Refer to 11-6. "Check of outdoor thermistors".
4 times
Lighted
Low discharge
temperature protection
• Refer to 11-6. "Check of LEV".
• Check refrigerant circuit and refrigerant amount.
5 times
Lighted
Cooling high-pressure
protection
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.
-
-
These symptoms do 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.
Twice
Lighted
Once
Lighted
The frequency of the compressor is kept 80Hz or more and the discharge
temperature is kept under 122°F(COOL mode) /104°F(HEAT mode) for
more than 40 minutes.
The frequency of the compressor is kept 80Hz or more and
the discharge temperature is kept under 102.2°F for more than 20
minutes.
The outdoor heat exchanger temperature exceeds 136.4°F during operation.
9 times
Lighted
Inverter check mode
Lighted
Lighted
Normal
The unit is operated with emergency operation switch.
-
The input current exceeds 15A.
The current of the compressor exceeds 15A.
The indoor gas pipe temperature exceeds 113°F during heating.
The indoor gas pipe temperature falls 37.4°F or below during cooling.
Outdoor electronic control P.C. board(Parts side)
LED2LED1
Lighted
MXZ-2B20NA
LED1LED2
Lighted
MXZ-3B24NA, MXZ-3B30NA
MXZ-4B36NA
LED1(Red) LED2(Yellow)
Abnormal point / Condition
Remedy
Indication
Condition
Outdoor unit
operates.
Outdoor unit
operates
normally.
No. Symptom
20
21
22
23
24
25
26
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
OFF
2.5-second OFF
2.5-second OFF
0.5-second ON
0.5-second ON
NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.
2. LED is lighted during normal operation.
OBH560G