Mitsubishi Electric CITY MULTI PUHY-P-YMF-B Installation Manual page 34

3. Remote controller
Check code
6101 Unreadable response receiving error
6600 Multiple address abnormality
6602 Transmission processor hardware abnormality
6603 Transmission circuit bus-busy abnormality
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>
Self-diagnosing
SW1 setting
item
Relay output
display 1
A
(Lighting)
B
1 2 3 4 5 6 7 8 9 10
Check
C
a
display 1
(Blinking)
A
Relay output
B
display 2
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
A
Check
B
indoor unit
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
A
Indoor unit
B
mode
1 2 3 4 5 6 7 8 9 10
b
A
B
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
A
Indoor unit
B
thermostat
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
A
Indoor unit
B
address
1 2 3 4 5 6 7 8 9 10
a Outdoor unit
A ON
34
Check Content
Flag 1 Flag 2 Flag 3
During Compres- Compres-
compres- sor 1
sor run operations operations
0000 to 9999 (Alternate display of address and error code)
SV4 21S4b SV5b
No.1 No.2 No.3
unit unit
No.9 No.10 No.11
unit unit
No.17 No.18 No.19
unit unit
No.1 No.2 No.3
unit unit
No.9 No.10 No.11
unit unit
No.17 No.18 No.19
unit unit
No.1 No.2 No.3
unit unit
No.9 No.10 No.11
unit unit
No.17 No.18 No.19
unit unit
Displays in order the addresses (1 through 50) of all indoor units connected to
the outdoor unit.
b Indoor unit
B OFF C At factory shipment
Check code
6606 Communications with transmission processor abnormality
6607 SC coil outlet (TH7)
6608 SC coil bypass outlet (TH8)
Display at LED lighting (blinking)
Flag 4 Flag 5 Flag 6
sor 2 21S4 SV1
SV6
CH2, 3 52F
No.4 No.5 No.6
unit unit unit unit
No.12
No.13 No.14
unit
unit unit unit
No.20
unit unit
No.4
No.5 No.6
unit
unit unit unit
No.12 No.13 No.14
unit unit unit unit
No.20
unit
unit
No.4 No.5 No.6
unit unit unit unit
No.12
No.13 No.14
unit
unit unit unit
No.20
unit unit
Check Content
Remarks
Flag 7 Flag 8
Flag 8 always lights
Always
SV22/32
at microcomputer
lighting
power ON
21S4b and SV5b are
closed with flag 1
No.7 No.8
unit unit
Lights at emergency
No.15 No.16
stop in IC
unit unit
Turns off by resetting
No.7 No.8
unit unit
Lights at cooling
No.15 No.16
Blinks at heating
unit unit
Turns off at stop/fan
No.7 No.8
unit unit
Lights at thermostat
on
No.15 No.16
Turns off at thermo-
unit unit
stat off