MITSUBISHI ELECTRIC MUZ-GB50VA - Manual (Page 22)

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Primary current protection
Secondary current protection
High-pressure protection
Defrosting in cooling
3 times Lighting
Discharge temperature
protection
• Check refrigerant circuit and refrigerant amount.
• Refer to 10-6. G "Check of LEV".
• Refer to 10-6. B "Check of outdoor thermistors".
4 times Lighting
Low discharge
temperature protection • Refer to 10-6. G "Check of LEV".
• Check refrigerant circuit and refrigerant amount.
5 times Lighting
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 Lighting
Once Lighting
When the discharge temperature exceeds 100 : during operation.
When the frequency of the compressor is kept 80Hz or more and
the discharge temperature is kept under 39
: for more than 20
minutes.
When the outdoor heat exchanger temperature exceeds 58 :
during operation.
9 times Lighting Inverter check mode
Lighting Lighting Normal
When the unit is operated with emergency operation switch.
-
When the input current exceeds 15A.
When the current of the compressor exceeds 15A.
When the indoor gas pipe temperature exceeds 45 : during heating.
When the indoor gas pipe temperature falls 3 : or below during cooling.
LED1(Red) LED2(Yellow)
Abnormal point / Condition Correspondence
Indication
Condition
Outdoor unit
operates.
Outdoor unit
operates
No. Symptom
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