Mitsubishi Electric Mr.SLIM PUHZ-RP35VHA2 Service Manual page 56

Error Code Abnormal points and detection method
Remote controller control board
1 Abnormal if data cannot be normally
read from the nonvolatile memory of the
E1
remote controller control board.
or
(Error code: E1)
E2 2 Abnormal if the clock function of remote
controller cannot be normally operated.
(Error code: E2)
Remote controller transmission
error(E3)/signal receiving error(E5)
1 Abnormal if remote controller could not
find blank of transmission path for 6 sec-
onds and could not transmit.
(Error code: E3)
2 Remote controller receives transmitted
data at the same time, compares the
data, and when detecting it, judges
E3
different data to be abnormal 30
or
continuous times. (Error code: E3)
E5
1 Abnormal if indoor controller board could
not find blank of transmission path.
(Error code: E5)
2 Indoor controller board receives trans-
mitted data at the same time, compares
the data,and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E5)
Indoor/outdoor unit communication
error (Signal receiving error)
(Outdoor unit)
Abnormal if outdoor controller circuit board
E8
could not receive anything normally for 3
(6840)
minutes.
Indoor/outdoor unit communication
error (Transmitting error) (Outdoor unit)
1 Abnormal if "0" receiving is detected 30
times continuously though outdoor con-
E9
troller circuit board has transmitted "1".
(6841)
2 Abnormal if outdoor controller circuit
board could not find blank of transmission
path for 3 minutes.
Non defined error code
This code is displayed when non defined
EF error code is received.
(6607
or
6608)
Serial communication error
1 Abnormal if serial communication
between outdoor controller circuit
board and outdoor power circuit board
is defective.
Ed
(0403)
2 Abnormal if communication between
outdoor controller circuit board and
M-NET board is not available.
Case
1 Defective remote controller
1 2 remote controller are set as
"main."
(In case of 2 remote con-
trollers)
2 Remote controller is connected
with 2 indoor units or more.
3 Repetition of refrigerant
address
4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiving
circuit of indoor controller board
6 Noise has entered into trans-
mission wire of remote control-
ler.
1 Contact failure of indoor/out-
door 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 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/ out-
door unit connecting wire.
1 Noise has entered transmission
wire of remote controller.
2 Noise has entered indoor/ out-
door unit connecting wire.
3 Outdoor unit is not a series of
power-inverter.
4 Model name of remote control-
ler is PAR-S25A.
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
1 Breaking of wire or contact
failure of connector between
outdoor controller circuit board
and M-NET board
2 Contact failure of M-NET board
power supply line
3 Noise has entered into M-NET
transmission wire.
56
Judgment and action
1 Replace remote controller.
1 Set a remote controller to main, and the
other to sub.
2 Remote controller is connected with only one
indoor unit.
3 The address changes to a separate setting.
4~6 Diagnose remote controller.
a) When "RC OK" is displayed, remote con-
trollers have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
indoor controller board.
b)When "RC NG" is displayed, replace
remote controller.
c)When "RC E3" or "ERC 00-66" is dis-
played, noise may be causing abnormal-
ity.
1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor or out-
door units.
2~4 Turn the power off, and on again to
check. Replace indoor controller board or
outdoor controller circuit board if abnormal-
ity is displayed again.
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.
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 power-inverter type
outdoor unit.
4 Replace remote controller with MA remote
controller.
12 Check connection of each connector CN2
and CN4 between the outdoor controller
circuit board and the outdoor power circuit
board.
3 Replace outdoor power circuit board.
4 Replace outdoor controller circuit board.
1 Check disconnection, looseness, or breaking of
connection wire between outdoor controller cir-
cuit board (CNMNT) and M-NET board (CN5).
2 Check disconnection, looseness, or breaking of
connection wire between outdoor controller cir-
cuit board (CNMNT) and M-NET board (CND).
3 Check M-NET transmission wiring method.