Mitsubishi Electric PUD-SHWM100VAA, Руководство по обслуживанию

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29
OCH756
Check code Abnormal point and detection method Cause Judgment and action
E8
(6840)
Indoor/outdoor unit communication
error (Signal receiving error) (Outdoor
unit)
Abnormal if outdoor controller circuit board
could not receive anything normally for 3
minutes.
1
Contact failure of indoor/
outdoor unit connecting wire
2
Defective communication circuit
of outdoor controller circuit board
3
Defective communication circuit
of indoor controller board
4
Noise has entered into indoor/
outdoor unit connecting wire.
1
Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor or
outdoor units.
2
–
4
Turn the power off, and on again to check.
Replace indoor controller board or outdoor
controller circuit board if abnormality is
displayed again.
E9
(6841)
Indoor/outdoor unit communication
error (Transmitting error) (Outdoor unit)
1
Abnormal if “0” receiving is detected 30
times continuously though outdoor
controller circuit board has transmitted
“1”.
2
Abnormal if outdoor controller circuit
board could not find blank of
transmission path for 3 minutes.
1
Indoor/ outdoor unit connecting
wire has contact failure.
2
Defective communication circuit
of outdoor controller circuit board
3
Noise has entered power supply.
4
Noise has entered indoor/
outdoor unit connecting wire.
1
Check disconnection or looseness of indoor/
outdoor unit connecting wire.
2
–
4
Turn the power off, and on again to check.
Replace outdoor controller circuit board if
abnormality is displayed again.
EF
(6607
or
6608)
Remote controller control board
1
Abnormal if data cannot be normally
read from the nonvolatile memory of the
remote controller control board.
(Check code: E1)
2
Abnormal if the clock function of remote
controller cannot be normally operated.
(Check code: E2)
1
Noise has entered transmission
wire of remote controller.
2
Noise has entered indoor/
outdoor unit connecting wire.
3
Outdoor unit is not inverter
models.
12
Turn the power off, and on again to check.
Replace indoor controller board or outdoor
controller circuit board if abnormality is
displayed again.
3
Replace outdoor unit with inverter type
outdoor unit.
Ed
(0403)
Serial communication error
1
Abnormal if serial communication
between outdoor controller circuit board
and outdoor power circuit board is
defective.
1
Breaking of wire or contact
failure of connector CN2
between the outdoor controller
circuit board and the outdoor
power circuit board
2
Breaking of wire or contact
failure of connector CN4
between the outdoor controller
circuit board and the outdoor
power circuit board
3
Defective communication circuit
of outdoor power circuit board
4
Defective communication circuit
of outdoor controller circuit
board for outdoor power circuit
board
12
Check connection of each connector CN2
and CN4 between the outdoor controller cir-
cuit board and the outdoor power circuit
board.
3
Replace outdoor power circuit board.
4
Replace outdoor controller circuit board.
P8
Pipe temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when condenser/
evaporator pipe temperature is not in
heating range within 20 minutes.
Note 3: It takes at least 27 minutes to
detect abnormality.
Note 4: It excludes the period of defrosting
(Detection restarts when defrost-
ing mode is over)
Heating range : 3°C
[
(Condenser/
Evaporator temperature(TH5)−
room temperature(TH1))
1
Slight temperature difference
between indoor room
temperature and pipe <liquid or
condenser/ evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser/
evaporator> thermistor
• Defective refrigerant circuit
2
Converse connection of
extension pipe (on plural units
connection)
3
Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4
Defective detection of indoor
room temperature and pipe
<condenser/evaporator>
temperature thermistor
5
Stop valve is not opened
completely.
1
–
4
Check pipe <liquid or condenser/evaporator>
temperature with room temperature display
on remote controller and outdoor controller
circuit board.
Pipe <liquid or condenser/ evaporator>
temperature display is indicated by setting
SW2 of outdoor controller circuit board as
follows.
23
Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
5
Check the stop valve is opened completely.
(
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool (PAC-SK52ST)’.
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
A-Control Service Tool SW2 setting
Temperature display of indoor liquid pipe
Indoor 1
Temperature display of indoor liquid pipe
Indoor 2
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
)