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FLOOR-STANDING Inverter Heat Pump
M series
TROUBLESHOOTING
FLOOR-
ST
ANDING
C-259
NOTE:
When the indoor unit has started operation and the above failures are detected (the first detection after the power
ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp
flashing.
Left lamp flashes.
7-time flash
2.5-second OFF
Left lamp flashes.
14-time flash
Left lamp flashes.
15-time flash
2.5-second OFF
2.5-second OFF
No.
1
3
6
7
Symptom
Operation indicator lamp
Check point
Left lamp flashes.
0.5-second ON
0.5-second OFF
Mis-Wiring
or serial
signal
Outdoor
power
system
Outdoor
thermistors
Outdoor
control
system
Indoor coil
thermistor
When the serial signal from the outdoor unit is
not received for a maximum of 6 minutes.
The compressor stops 3 times consecutively
for over current protection or start-up failure
protection within 1 minute after start-up.
When the outdoor thermistors short or open
circuit during the compressor operation.
When it cannot properly read data in the
nonvolatile memory of the inverter P.C. board
or of the outdoor electronic control P.C. board.
4 Indoor fan
motor
8
Abnormal
point
Room
tempera-
ture
thermistor
Left lamp flashes.
2-time flash
2.5-second OFF
When the indoor coil or the room temperature
thermistor is shorts or opens circuit.
Left lamp flashes.
3-time flash
2.5-second OFF
When the rotational frequency feedback
signal is not emitted during the indoor fan
operation.
Indoor unit
and outdoor
unit do not
operate.
Indoor unit
and outdoor
unit do not
operate.
Left lamp flashes.
5-time flash
2.5-second OFF
Left lamp flashes.
6-time flash
2.5-second OFF
Indoor unit
and outdoor
unit do not
operate.
Indoor unit
and outdoor
unit do not
operate.
Indoor unit
and outdoor
unit do not
operate.
Other
abnormality
An abnormality other than above mentioned is
detected.
Indoor unit
and outdoor
unit do not
operate.
Indoor unit
and outdoor
unit do not
operate.
9
Indoor
damper
When the damper is not located
at the designated position.
Indoor unit
and outdoor
unit do not
operate.
10
5
Left lamp flashes.
4-time flash
2.5-second OFF
Indoor
control
system
When it cannot properly read data in the
nonvolatile memory of the indoor electronic
control P.C. board.
Indoor unit
and outdoor
unit do not
operate.
Outdoor
control
system
When it cannot properly read data in the
nonvolatile memory of the inverter P.C. board
or of the outdoor electronic control P.C. board.
2
Outdoor unit
does not
operate.
Left lamp lights up
Troubleshooting Check Table
NOTE:
Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
OPERATION INDICATOR
Not lighted
Blinking
Lighted
· Flashing of OPERATION INDICATOR lamp (left-hand side lamp)
indicates abnormalities.
Self check table
MFZ-KA25VA MFZ-KA35VA MFZ-KA50VA
Summary of Contents for M-SERIES
Page 6: ...M series C WALL MOUNTED ...
Page 38: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 36 MUH GD80VB OUTDOOR UNIT ...
Page 40: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 38 OUTDOOR UNIT MUZ FD50VA ...
Page 42: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 40 OUTDOOR UNIT MUZ FD50VABH ...
Page 45: ...WALL MOUNTED Outdoot Unit M series WIRING DIAGRAM WALL MOUNTED C 43 MUZ GE42VA OUTDOOR UNIT ...
Page 46: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 44 MUZ GE42VAH OUTDOOR UNIT ...
Page 47: ...WALL MOUNTED Outdoot Unit M series WIRING DIAGRAM WALL MOUNTED C 45 MUZ GE50VA OUTDOOR UNIT ...
Page 48: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 46 MUZ GE50VAH OUTDOOR UNIT ...
Page 50: ...WALL MOUNTED Outdoor Unit M series WIRING DIAGRAM WALL MOUNTED C 48 MUZ HC25VA OUTDOOR UNIT ...
Page 192: ...WALL MOUNTED Inverter Heat Pump M series INSTALLATION PROCEDURE WALL MOUNTED C 190 ...
Page 271: ...FLOOR STANDING MFZ KA VA Series M series OPERATION FLOOR STANDING C 269 ...
Page 272: ...FLOOR STANDING MFZ KA VA Series M series OPERATION FLOOR STANDING C 270 f i save OPERATION ...
Page 289: ...CEILING CASSETTE Inverter Heat Pump M series INSTALLATION PROCEDURE CEILING CASSETTE C 287 ...
Page 290: ...CEILING CASSETTE Inverter Heat Pump M series INSTALLATION PROCEDURE CEILING CASSETTE C 288 ...
Page 292: ...CEILING CASSETTE Inverter Heat Pump M series INSTALLATION PROCEDURE CEILING CASSETTE C 290 ...
Page 293: ...CEILING CASSETTE Inverter Heat Pump M series INSTALLATION PROCEDURE CEILING CASSETTE C 291 ...
Page 294: ...CEILING CASSETTE Inverter Heat Pump M series INSTALLATION PROCEDURE CEILING CASSETTE C 292 ...
Page 300: ...CEILING CASSETTE M series CEILING CASSETTE C 298 ...