Mitsubishi Electric PUZ-HWM140VHA, Руководство по обслуживанию

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21
OCH748
Check Code Abnormal point and detection method Cause Judgment and action
EA
(6844)
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
1. Outdoor controller circuit board can
automatically check the number of
connected Interface unit/Flow temp.
controller. Abnormal if the number can-
not be checked automatically due to
miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
and etc. after power is turned on for 4
minutes.
2. Abnormal if outdoor controller circuit
board recognizes excessive number of
Interface unit/Flow temp. controller.
1
Contact failure or miswiring
of Interface unit/Flow temp.
controller-outdoor unit
connecting wire
2
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
3
Excessive number of Interface
unit/Flow temp. controller is
connected to 1 outdoor unit.
(2 units or more)
4
Defective transmitting
receiving circuit of outdoor
controller circuit board
5
Defective transmitting
receiving circuit of Interface/
Flow temp. controller board
6
Noise has entered into power
supply or Interface/Flow
temp. controller-outdoor unit
connecting wire.
1
Check disconnection, looseness or polarity of
Interface unit/Flow temp. controller-outdoor
unit connecting wire of Interface unit/Flow
temp. controller and outdoor units.
2
Check diameter and length of Interface unit/
Flow temp. controller-outdoor unit connect-
ing wire.
Total wiring length: 80 m
(Including wiring connecting each Interface
unit/Flow temp. controller unit and between
Interface unit/Flow temp. controller and out-
door unit)
Also check if the connection order of flat
cable is S1, S2, S3.
3
Check the number of Interface unit/Flow
temp. controller that is connected to 1 out-
door unit. (If EA is detected.)
4
–
5
Turn the power off once, and on again to
check.
Replace outdoor controller circuit board
or Interface/Flow temp. controller board if
abnormality occurs again.
6
Check transmission path, and remove the
cause.
Note: The descriptions above,
1
–
6
, are for
EA, Eb and EC.
Eb
(6845)
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
(reverse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of
Interface unit/Flow temp. controller.
Abnormal if the Interface unit/Flow temp.
controller number cannot be set within
4 minutes after power on because of
miswiring (reverse wiring or disconnection)
of Interface unit/Flow temp. controller-
outdoor unit connecting wire.
1
Contact failure or miswiring
of Interface unit/Flow temp.
controller-outdoor unit
connecting wire
2
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
4
Defective transmitting
receiving circuit of outdoor
controller circuit board
5
Defective transmitting
receiving circuit of Interface/
Flow temp. controller board
6
Noise has entered into power
supply or Interface unit/Flow
temp. controller-outdoor unit
connecting wire.
EC
(6846)
Startup time over
The unit cannot finish startup process
within 4 minutes after power on.
1
Contact failure of Interface unit
/Flow temp. controller-outdoor
unit connecting wire
2
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
6
Noise has entered into power
supply or Interface unit/Flow
temp. controller-outdoor unit
connecting wire.
EE
(7130)
Incorrect connection
The outdoor unit does not receive the
signals of I/F or FTC.
1
A device other than Interface
unit or Flow temp. controller
unit is connected to the unit.
1
Connect I/F or FTC to the unit.