![Mitsubishi Electric MUCF-C13UV-E1 Скачать руководство пользователя страница 32](http://html.mh-extra.com/html/mitsubishi-electric/mucf-c13uv-e1/mucf-c13uv-e1_service-manual_1810844032.webp)
32
1. Troubleshooting check table
Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
Self check table
11-2. Instruction of troubleshooting
Operation Indicator
· Flashing of the OPERATION INDICATOR lamp (on the left-hand side)
indicates possible abnormalities.
· The OPERATION INDICATOR lamp (on the left-hand side) is lighting during
normal operation.
•The following indication applies regardless of shape of the indocator.
Flashing
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Indoor unit
doesn't receive
the signal from
remote controller.
OPERATION
INDICATOR
lamp on the indoor
unit is flashing
on and off.
Outdoor unit
operates in
only Test Run
operation.
Outdoor unit
doesn't
operate
even in
Test Run
operation.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to "Test point
diagram and
voltage" on page 36.
Refer to
D
"Check of
outdoor unit"
on page 35.
Refer to
B
"Check of
remote controller
and receiver
P.C. board"
on page 34.
Refer to
C
"Check of indoor
electronic control
P.C. board"
on page 35.
2-time flash
Cause: Indoor unit
• Trouble of room
temperature/ indoor
coil thermistor
Check room tempre-
ture thermistor and
indoor coil thermistor
Refer to "Test point
diagram and voltage"
on page 36.
When the remote
controller is
pressed
or when the
EMERGENCY
OPERATION
switch is
pressed,
the fan doesn't
rotate, with
OPERATION
INDICATOR
lamp on.
Refer to
A
"Check of
indoor fan
motor" on
page 34.
NO.
1
Abnormal
point
Indoor coil
thermistor
Room
tempera-
ture ther-
mistor
Indication
2-time flash
2.5-second OFF
Symptom
Outdoor unit
does not run.
Detect method
Detect Indoor coil/room tem-
perature thermistor short or
open circuit.
Check point
●
Check resistance of thermistor.
●
Re-connect connector.
●
Check indoor electronic control P.C.board.
OB299--2.qxp 02.4.25 10:40 AM Page 32