Outdoor Unit - Mitsubishi Electric MUZ-FD25VABH - E1 Service Manual

Mitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oy
LED indication
No. Symptom
LED1(Red) LED2(Yellow)

Outdoor unit

operates.
20 Once Lighting
21 Twice Lighting
22 3 times Lighting
23 4 times Lighting
24 5 times Lighting
Outdoor unit
25 9 times Lighting
operates
26 Lighting Lighting
Abnormal point/ Con-
dition
Primary current pro- The input current exceeds 15 A.
tection
Secondary current pro- The current of the compressor exceeds 15 A.
tection
High-Pressure protec- The indoor gas pipe temperature exceeds 45°C during heating.
tion
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 tem- The frequency of the compressor is kept 80 Hz or more and
perature protection the discharge temperature is kept under 39°C for more than 20
minutes.
Cooling high-pressure The outdoor heat exchanger temperature exceeds 58°C during
protection operation.
Inverter check mode The unit is operated with emergency operation switch.
Normal
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Condition
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33
Correspondence
These symptoms do not mean any
abnormality 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 aircir-
culation is short cycled.
• Check refrigerant circuit and refrig-
erant amount.
• Refer to 11-5. "Check of LEV".
• Refer to 11-5. "Check of outdoor
thermistors''.
• Refer to 11-5. "Check of LEV".
• Check refrigerant circuit and refrig-
erant amount.
This symptom does not mean any
abnormality 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
circulation is short cycled.
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