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3 Remote controller check result
When remote controller is normal
Since there is no problem at the remote controller, check for other causes.
When the problem is other than the checked remote controller
(Error code 2) "E3" "6833" "6832" flash → Cannot send
There is noise on the transmission line, or the indoor unit or another remote con-
troller is faulty. Check the transmission line and the other remote controllers.
4 Remote controller check reset
When the H [CHECK] button is held down for five seconds or longer, remote controller check resets and the "PLEASE WAIT" and RUN lamp flash. Approximately 30
seconds later, the remote controller returns to the state before remote controller check.
13. Troubleshooting
13.1. How to handle problems with the test run
Error code list: details
Remote controller
MELANS display
display
E0
6831,6834
E1, E2
6201,6202
E3
6832,6833
E4
6831,6834
E5
6832,6833
E6
6740,6843
E7
6841,6842
E8
6840,6843
E9
6841,6842
EA
6844
EB
6845
EC
6846
ED
0403
EE
0403
F1
4103
F8
4115
A0
6600
A2
6602
A3
6603
A6
6606
A7
6607
A8
6608
EF
undefined
U2
1102
U2
1108
U3
5104
U4
5105
U6
4101
UE
1302
UL
1300
F8
4115
P1
5101
P2
5102
P4
2503
P5
2502
P5
2500
P6
1503
P6
1504
P8
1110
P9
5103
ERROR CODE
Remote controller communication – reception error
Remote controller board error
Remote controller communication – transmission error
Remote controller communication – reception error
Remote controller communication – transmission error
Communication between indoor and outdoor units – reception error
Communication between indoor and outdoor units – transmission error
Communication between indoor and outdoor units – reception error
Communication between indoor and outdoor units – transmission error
Indoor/outdoor connection wiring error, indoor unit overload (5 units or more)
Indoor/outdoor connection wiring error (interference, loose)
Excessive time in use
Serial communication error
Serial communication error
Reverse phase, out of phase verification
Faulty input circuit
Duplicated M-NET address setting
M-NET error in PH/W transmission
M-NET bus busy
M-NET communication error with P transmission
M-NET error – no ACK
M-NET error- no response
Undefined error code
Outlet temperature error
CN23 Short-circuit Connector Unplugged
Open/short in discharge temp thermistor
Open/short in liquid temp thermistor
Compressor overcurrent interruption (51C operation)
High pressure error (63H1 operation)
Low pressure error (63L operation)
Power synchronous idle circuit error
Return air temperature sensor error
Pipe (TH2) sensor error
Drain sensor error/Float switch connector open
Drain pump error
Water leak error (PDH only)
Freeze prevention operation
Surge prevention operation
Pipe temperature error/Outdoor unit error
Open/short in condenser/evaporater temp thermistor
When remote controller is faulty
(Error display 1) "NG" flashes → Remote controller send/receive circuit abnormal
Remote controller switching is necessary.
(Error display 3) "ERC" and data error count are displayed → Data error generation
"Data error count" is the difference between the number of bits of remote controller
send data and the number of bits actually sent to the transmission line. In this case,
the send data was disturbed by the noise, etc. Check the transmission line.
When data error count is 02
Remote controller send data
Send data on transmission line
Error details
Problem location
Remote Controller
Remote Controller
Remote Controller
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
M-NET board
Outdoor unit
Outdoor unit
M-NET board
M-NET board
M-NET board
M-NET board
M-NET board
M-NET board
–
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
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