Continuous; Noise - Mitsubishi Electric Mr.SLIM PUH-P1VGAA Technical & Service Manual

Error Code Meaning of error code and detection method
Compressor over current (start-up
UF locked) breaking
Abnormal if compressor current exceeds
(4100)
1.2 times of overload set value.
Current sensor error
Abnormal if compressor current is not
detected on first compressor start-up after
power supply is put on.
UH
(5300)
Abnormal low pressure (63L worked)
Abnormal if connector (63L) is open
(under- 0.03MPa) during compressor oper-
ation.
UL
(1300)
Remote controller communication error
(Signal receiving error)
(1) Abnormal if any signal from IC of refrig-
erant address "0" could not normally
received for three minutes.
(2) Abnormal if sub remote controller could
not receive any signal for two minutes.
E0
(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 continuous-
ly.
Indoor/outdoor unit communication
error (Signal receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller could not
E8 receive anything normally for three
(6840) minutes.
Case
1 Abnormal compressor
2 Clogged indoor filter
3 Open-phase compressor
1 Disconnection or contact fail-
ure of connector (52C) on out-
door controller board
2 Disconnection or contact fail-
ure of coil 52C
3 Defective outdoor controller
board
4 Defective parts of 52C
5 Compressor V-phased wire
does not penetrate through
current detector.
1 Gas pipe side ball valve and
liquid pipe side stop valve are
shut during operation.
2 Disconnection or contact fail-
ure of connector (63L) on out-
door controller board.
3 Disconnection or contact fail-
ure of 63L.
4 Defective outdoor controller
board
5 Leakage or defective of refrig-
erant
6 Defective action of linear
expansion valve
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 transmis-
sion wire of remote controller.
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.
5 Wiring regulations are not
observed. Refer to (2) The
transmitting specification for
"A" control on page 59.
•Length of wires
•Number of remote controllers
•Diameter of wires
•Number of indoor units
1 Defective communication cir-
cuit of remote controller.
2 Noise has entered transmis-
sion wire of remote controller.
3 Two or more remote con-
trollers are set as "main."
1 Contact failure of indoor/out-
door unit connecting wire
2 Defective communication cir-
cuit of indoor controller board
3 Defective communication cir-
cuit of indoor controller board
4 Noise has entered indoor/ out-
door unit connecting wire.
41
Judgment and action
1 Check compressor.
Refer to 6-2.
2 Check indoor unit and repair defective.
3 Check connection.
12 Check connection.
3 Replace outdoor controller board.
4 Check 52C.
5 Check wiring.
1 Open ball valve and stop valve.
234 Put the power off and on again to check
if F3 is displayed on restarting.
If F3 is displayed, follow the F3 process-
ing direction.
5 Leakage or defective of refrigerant
6 Check linear expansion valve
Refer to 6-2.
123 Diagnose remote controller
Dispose as follows according to diagno-
sis 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 one of the remote controllers "main", if
outdoor LED is E4 while E0 is displayed at
remote controller.
1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor or out-
door units.
234 Put the power off, and on again to
check. Replace indoor controller board
or outdoor controller board if abnormality
is displayed again.