Mitsubishi Electric M-SERIES, Руководство пользователя

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WALL-MOUNTED Inverter Heat Pump
M series
TROUBLESHOOTING
W
ALL-
MOUNTED
C-166
MUZ-FD50VA
MUZ-FD50VAH
LED1(Red) LED2(Yellow)
Lightning Twice Outdoor power system
Lightning 3 times
Discharge temperature
thermistor
Outdoor heat exchanger
temperature thermistor
Defrost thermistor
Lightning 7 times Nonvolatile memory data
Lightning 8 times Current sensor
Lightning 11 times
Communication error
between P.C. boards
Lightning 12 times
Zero cross detecting
circuit
Abnormal point/Condition
A short circuit is detected in the thermistor during operation,
or an open circuit is detected in the thermistor after 5 minutes
(in cooling) and 10 minutes (in heating) of compressor start-up.
A short circuit is detected in the thermistor during operation,
or an open circuit is detected in the thermistor after 5 minutes
of compressor start-up.
Indication
Overcurrent protection stop is continuously performed
3 times within 1 minute after the compressor gets
started, or when converter protection stop or bus-bar
voltage protection stop is continuously performed 3
times within 3 minutes after start-up.
A short circuit is detected in the thermistor during
operation, or an open circuit is detected in the
thermistor after 10 minutes of compressor start-up.
Condition
The nonvolatile memory data cannot be read properly.
Lightning 6 times Serial signal
Fin temperature
thermistor
P.C board temperature
thermistor
Lightning 4 times
Ambient temperature
thermistor
Current sensor protection stop is continuously performed twice.
The communication protection stop between boards is
continuously performed twice.
The protection stop of the zero cross detecting circuit is
continuously performed 10 times.
A short or open circuit is detected in the thermistor
during operation.
A short or open circuit is detected in the thermistor
during operation.
5 times Lightning
Outdoor electronic control P.C. board(Parts side)
Lighting
IPM protection
Lock protection
3 times Goes out
Discharge temperature
protection
Fin temperature
protection
P.C. board temperature
protection
High-pressure
protection
8 times Goes out
Converter protection
Bus-bar voltage
protection (1)
Bus-bar voltage
protection (2)
13 times Goes out Outdoor fan motor
Lighting 8 times
Current sensor
protection
Lighting 11 times
Communication between P.C.
boards protection
Lighting 12 times
Zero cross detecting circuit
protection
Twice Goes out
4 times Goes out
5 times Goes out
9 times Goes out
Overcurrent is detected after 30 minutes of compressor start-up.
Overcurrent is detected within 30 minutes of compressor
start-up.
The bus-bar voltage exceeds 400V or falls to 200V or below
during compressor operating.
The bus-bar voltage exceeds 400V or falls to 50V or below
during compressor operating.
Discharge temperature exceeds 116 during operation and
compressor stops. Compressor can restart if discharge
temperature thermistor reads 100 or less 3 minutes later.
The fin temperature exceeds 87 during operation.
The P.C. board temperature exceeds 70 during operation.
Failure occurs continuously 3 times within 30 seconds after the
fan gets started.
A short or open circuit is detected in the current sensor during
compressor operating.
Communication error occurs between the outdoor electronic
control P.C. board and power board for more than 10 seconds.
Zero cross signal cannot be detected while the compressor is
operating.
The outdoor heat exchanger temperature exceeds 70 during
cooling or indoor gas pipe temperature exceeds 70 during
heating.
A failure is detected in the operation of the converter during
operation.
Outdoor unit
does not
operate.
LED2 LED1
The communication fails between the indoor and outdoor
unit for 3 minutes.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Symptom
'Outdoor unit
stops and
restarts 3
minutes
later' is
repeated.
ON
OFF
2.5-second OFF
2.5-second OFF
The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) When the flashing frequency is “2”.
0.5-second ON
0.5-second ON
NOTE 1. The location of LED is illustrated at the right figure.
2. LED is lighted during normal operation.
Troubleshooting check table