Mitsubishi Electric Mr.Slim MUZ-GC25NA - C1 Service Manual page 32

Indication
No. Symptom
LED2
LED1 (Red)
(Yellow)
Outdoor unit Once Lighting
operates.
20
Twice Lighting
21
3 times Lighting
22
4 times Lighting
23
5 times Lighting
24
Outdoor unit 9 times Lighting
operates
25
Lighting Lighting
26
Abnormal point /
Condition
Primary current protection The input current exceeds 15 A.
Secondary current protec- The current of the compressor exceeds 15 A.
tion
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
Low discharge tempera- The frequency of the compressor is kept 80 Hz or more and the dis-
ture protection charge temperature is kept under 39°C for more than 20 minutes.
Cooling high-pressure The outdoor heat exchanger temperature exceeds 58°C during op-
protection eration.
Inverter check mode The unit is operated with emergency operation switch.
Normal -
Condition
32
Correspondence
These symptoms do not mean any ab-
normality of the product, but check the
following points.
• Check if indoor fi lters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circu-
lation is short cycled.
• Check refrigerant circuit and refriger-
ant amount.
• Refer to 9-5 . "Check of LEV".
.
• Refer to 9-5 "Check of outdoor
thermistors".
.
• Refer to 9-5 "Check of LEV".
• Check refrigerant circuit and refriger-
ant amount.
This symptom does not mean any ab-
normality of the product, but check the
following points.
• Check if indoor fi lters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circu-
lation is short cycled.
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