Mitsubishi Electric SUZ-KA25VA Technical & Service Manual page 59

Indication
No. Symptom
LED1(Red) LED2(Yellow)
Outdoor unit
20 Once Lighting
operates.
Twice Lighting
21
22 3 times
Lighting
4 times
23 Lighting
5 times Lighting
24
Outdoor unit
operates
25 9 times Lighting
Lighting
26
Lighting
Abnormal point / Condition
Primary current protection When the input current exceeds 15A.
Secondary current protection When the current of the compressor exceeds 15A.
High-pressure protection
When the indoor gas pipe temperature exceeds 45: during heating.
Defrosting in cooling When the indoor gas pipe temperature falls 3: or below during cooling.
Discharge temperature
When the discharge temperature exceeds 100: during operation.
protection
When the frequency of the compressor is kept 80Hz or more and
Low discharge
the discharge temperature is kept under 39: for more than 20
temperature protection
minutes.
Cooling high-pressure
When the outdoor heat exchanger temperature exceeds 58:
protection
during operation.
Inverter check mode When the unit is operated with emergency operation switch.
Normal
Condition
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59
Correspondence
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.
• Check refrigerant circuit and refrigerant amount.
• Refer to 12-5.T "Check of LEV".
• Refer to 12-5.V "Check of outdoor thermistors".
• Refer to 12-5.T "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 if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
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