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Mitsubishi Electric ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla: Jäähdytinpalvelu RefGroup Oy
11-2. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
doesn't
Outdoor unit
operate
operates in
even in
only Test Run
Test Run
operation.
operation.
Check room
temperature
Refer to A
thermistor.
"Check of
Refer to
inverter/
"Test point
compressor"
diagram and
on page 26.
voltage".
MSZ type
Left lamp
Both lamps
Flash on and
(Left and right)
off at
Flash on and off
0.5-second
at 0.5-second
intervals
intervals
Cause:
Cause:
Indoor/
Indoor unit
Outdoor unit
• The horizontal
• Mis-wiring or
vanes are not
trouble of
installed
correctly.
serial signal.
Refer to N
Refer to
"Check of
"How to check
installation of
of mis-wiring
the horizontal
and serial
vanes".
signal error
(When
outdoor unit
doesn't work)"
on page 31.
Indoor unit
Indoor unit operates.
doesn't receive
Outdoor unit doesn't
the signal from
operate normally.
remote controller.
Unit doesn't
Indoor unit
operate
operates, when
normal
the EMERGENCY
operation in
OPERATION
COOL or
switch is pressed.
HEAT mode.
Refer to
"Check of
Refer to H
remote controller
"Check of
and receiver
R.V. coil"
P.C. board".
on page 28.
Left lamp
MSZ type
2-time flash
Left lamp
Cause:
3-time flash
Indoor unit
Cause:
• Trouble of
Indoor unit
room temp-
• Trouble of
erature/
indoor fan
indoor coil
motor
thermistor
Refer to
Check room
"Check of
temperature
indoor fan
thermistor
motor".
and indoor
coil thermis-
tor.
Refer to
"Test point
diagram and
voltage".
www.ilmalämpöpumput.com
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
1. Check indoor / outdoor
connecting wire.
(Check if the power
is supplied to the
indoor unit.)
2. Refer to
"Check of indoor
electronic control
P.C. board".
Left lamp
Left lamp
4-time flash
5-time flash
Cause:
Cause:
Indoor unit
Outdoor unit
• Trouble of
• Outdoor
indoor unit
power
control
system
system
abnormality
Refer to A
Replace the
indoor
"Check of
inverter/
electronic
compressor"
control
on page 26.
P.C. board.
23
As for indoor unit MSZ type,
refer to service manual OB327.
As for indoor unit MCFZ type,
refer to service manual OB344.
Left lamp
Left lamp
7-time flash
6-time flash
Cause:
Cause:
Outdoor unit
Outdoor unit
• Trouble of
• Trouble of
outdoor
thermistor
control
in outdoor
system
unit
Refer to G
Replace the
"Check of
inverter P.C.
outdoor
board.
thermistors"
on page 28.
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