Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 114

Error Code Meaning of error code and detection method
Remote controller communication error
(Signal receiving error)
(1) Abnormal if any signal from IC of refrig-
erant address "0" could not be normally
received for three minutes.
(2) Abnormal if sub remote controller could
E0
not receive any signal for two minutes.
(No display)
Remote controller communication error
(Transmitting error)
(1) Abnormal if sub remote controller could
not find blank of transmission path for
E3
six seconds.
(No display)
(2) Abnormal if remote controller could not
finish transmitting 30 times continuously.
Indoor/outdoor unit communication
error (Signal receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller circuit
E8
board could not receive anything
(6840)
normally for three 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 three minutes.
Non defined error code
This code is displayed when non defined
error code is received.
EF
(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 communication cir-
cuit of remote controller
2 Defective communication cir-
cuit of indoor controller board
of refrigerant address "0"
3 Noise has entered into trans-
mission line of remote con-
troller.
4 All remote controllers are set
as "sub" remote controller. In
this case, E4 is displayed at
outdoor LED, and E0 is dis-
played at remote controller.
1 Defective communication cir-
cuit of remote controller
2 Noise has entered into trans-
mission line of remote con-
troller.
3 Two remote controllers are set
as "main."
(In case of 2 remote controllers)
1 Contact failure of indoor/outdoor
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 transmis-
sion 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 con-
troller 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.
114
Judgment and action
1~3 Diagnose remote controller.
Take actions as follows according to
diagnosis result.
a) When "RC OK" is displayed,
remote controllers have no problem.
Put the power off, and on again to
check. If, "H0" is displayed for four
minutes or more, replace indoor con-
troller 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 abnor-
mality.
4 Set a remote controller to main, and the
other to sub.
w The descriptions above, 1-3, are for E0 and
E3.
1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor or out-
door units.
2~4 Put the power off, and on again to check.
Replace indoor controller board or outdoor
controller circuit board if abnormality is
displayed again.
1 Check disconnection or looseness of
indoor/outdoor unit connecting wire.
2~4 Put the power off, and on again to check.
Replace outdoor controller circuit board if
abnormality is displayed again.
12 Put 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
circuit board(CNMNT) and M-NET board
(CN5).
2 Check disconnection, looseness, or breaking
of connection wire between outdoor controller
circuit board(CNMNT) and M-NET board
(CND).
3 Refer to (4) in " 2-2. M-NET Wiring method "
on page 4.