Mitsubishi Electric PUD-SHWM100VAA, Руководство по обслуживанию

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28
OCH756
Check code Abnormal point and detection method Cause Judgment and action
UP
(4210)
Compressor overcurrent interruption
Abnormal if overcurrent DC bus or
compressor is detected after compressor
starts operating for 30 seconds.
1
Stop valve of outdoor unit is closed.
2
Decrease of power supply voltage
3
Looseness, disconnection or
converse of compressor wiring
connection
4
Defective fan of indoor/outdoor units
5
Short cycle of indoor/outdoor units
6
Defective input circuit of
outdoor controller board
7
Defective compressor
8
Defective outdoor power circuit board
9
DIP switch setting difference of
outdoor controller circuit board
1
Open stop valve.
2
Check facility of power supply.
3
Correct the wiring (U·V·W phase) to
compressor. Refer to "9-6.TEST POINT
DIAGRAM" (Outdoor power circuit board).
4
Check indoor/outdoor fan.
5
Solve short cycle.
6
Replace outdoor controller circuit board.
Note:
Before the replacement of the outdoor
controller circuit board, disconnect the wiring
to compressor from the outdoor power circuit
board and check the output voltage among
phases, U, V, W, during test run.
No defect on board if voltage among phases
(U-V, V-W and W-U) is same. Make sure to
perform the voltage check with same
performing frequency.
7
Check compressor. Refer to "9-4. HOW TO
CHECK THE PARTS".
8
Replace outdoor power circuit board.
9
Check the DIP switch setting of outdoor
controller circuit board.
E0
or
E4
(6831
or
6834)
Remote controller transmission error
(E0)/signal receiving error (E4)
1
Abnormal if main remote controller
cannot receive normally any
transmission from indoor unit of
refrigerant address “0” for 3 minutes.
(Check code: E0)
1
Abnormal if indoor controller board can-
not receive normally any data from
remote controller board or from other
indoor controller board for 3 minutes.
(Check code: E4)
2
Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Check code: E4)
1
Contact failure at transmission
wire of remote controller
2
Miswiring of remote controller
3
Defective transmitting receiving
circuit of remote controller
4
Defective transmitting receiving
circuit of indoor controller board
of refrigerant address “0”
5
Noise has entered into the
transmission wire of remote
controller.
1
Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2
Check wiring of remote controller.
• Total wiring length: Max. 500 m
(Do not use cable with 3 or more cores.)
• The number of connecting indoor units:
Max. 6 units
• The number of connecting remote controller:
Max. 1 unit
If the cause of trouble is not in above
1
–
2
,
3
Diagnose remote controller (PAC-IF011B-E only).
a) When “OK” is displayed,
remote controllers have no problem.
Turn the power off, and on again to check.
If abnormality occurs again, replace indoor
controller board.
b) When “NG” is displayed,
replace remote controller.
c) When "E3" or "00-66" is displayed, noise
may be causing abnormality.
Note:
If the unit is not normal after replacing
indoor controller board in group control,
indoor controller board of address “0” may
be abnormal. For the controllers other than
PAC-IF011B-E, refer to Installation Manual
or Service Handbook of the indoor unit.
E1
or
E2
(6201
or
6202)
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
Defective remote controller
1
Replace remote controller.
E3
or
E5
(6832
or
6833)
Remote controller transmission error
(E3)/signal receiving error (E5)
1
Abnormal if remote controller could not
find blank of transmission path for 6
seconds and could not transmit.
(Check code: E3)
2
Remote controller receives transmitted
data at the same time, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Check code: E3)
1
Abnormal if indoor controller board could
not find blank of transmission path.
(Check code: E5)
2
Indoor controller board receives
transmitted data at the same time,
compares the data, and when detecting
it, judges different data to be abnormal
30 continuous times. (Check code: E5)
1
Duplication of refrigerant
address
2
Defective transmitting receiving
circuit of remote controller
3
Defective transmitting receiving
circuit of indoor controller board
4
Noise has entered into
transmission wire of remote
controller.
1
The address changes to a separate setting.
2
–
4
Diagnose remote controller (PAC-IF011B-E only).
a) When “OK” is displayed, remote controllers
have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
indoor controller board.
b) When “NG” is displayed, replace remote
controller.
c) When “E3” or “00-66” is displayed, noise
may be causing abnormality.
Note: For the controllers other than PAC-
IF011B-E, refer to Installation Manual or
Service Handbook of the indoor unit.