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3. Remote controller
Check code Check Content Check code Check Content
6101 Unreadable response receiving error
6600 Multiple address abnormality
6602 Transmission processor hardware abnormality
6603 Transmission circuit bus-busy abnormality
6606
Communications with transmission processor abnormality
6607 SC coil outlet (TH7)
6608 SC coil bypass outlet (TH8)
2 Diagnostic switch (SW1) and the service LED on multi-controller board of indoor unit can be used to judge a malfunction of outdoor unit.
<Operation of self-diagnosis switch (SW1) and the service LED display>
Display at LED lighting (blinking)
Flag 1 Flag 2 Flag 3 Flag 4 Flag 5 Flag 6 Flag 7 Flag 8
A
B
C
12345678910
A
B
12345678910
Relay output
display 1
(Lighting)
Check
display 1
(Blinking)
Relay output
display 2
Check
indoor unit
Indoor unit
mode
Indoor unit
thermostat
Indoor unit
address
During
compres-
sor run
SV4
No.1
unit
No.9
unit
No.17
unit
No.1
unit
No.9
unit
No.17
unit
No.1
unit
No.9
unit
No.17
unit
Compres-
sor 2
operations
SV5b
No.3
unit
No.11
unit
No.19
unit
No.3
unit
No.11
unit
No.19
unit
No.3
unit
No.11
unit
No.19
unit
21S4
SV6
No.4
unit
No.12
unit
No.20
unit
No.4
unit
No.12
unit
No.20
unit
No.4
unit
No.12
unit
No.20
unit
SV1
CH2, 3
No.5
unit
No.13
unit
No.5
unit
No.13
unit
No.5
unit
No.13
unit
52F
No.6
unit
No.14
unit
No.6
unit
No.14
unit
No.6
unit
No.14
unit
SV22/32
No.7
unit
No.15
unit
No.7
unit
No.15
unit
No.7
unit
No.15
unit
Compres-
sor 1
operations
21S4b
No.2
unit
No.10
unit
No.18
unit
No.2
unit
No.10
unit
No.18
unit
No.2
unit
No.10
unit
No.18
unit
Always
lighting
No.8
unit
No.16
unit
No.8
unit
No.16
unit
No.8
unit
No.16
unit
0000 to 9999 (Alternate display of address and error code)
Flag 8 always lights
at microcomputer
power ON
21S4b and SV5b are
closed with flag 1
Lights at emergency
stop in IC
Turns off by resetting
Lights at cooling
Blinks at heating
Turns off at stop/fan
Lights at thermostat
on
Turns off at thermo-
stat off
A
B
12345678910
A
B
12345678910
A
B
12345678910
A
B
12345678910
A
B
12345678910
A
B
12345678910
A
B
12345678910
a Outdoor unit b Indoor unit
A ON B OFF C At factory shipment
a
b
Self-diagnosing
item
SW1 setting
Displays in order the addresses (1 through 50) of all indoor units connected to
the outdoor unit.
A
B
12345678910
A
B
12345678910
A
B
12345678910
Remarks