Mitsubishi Electric CITY MULTI PUHY-P-YSMF-B Manuel D'installation page 41

2 Diagnostic switch (SW1) and the service LED on multi-controller board of the variable capacity 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
B
1 2 3 4 5 6 7 8 9 10
Check
indoor unit
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
B
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
Indoor unit
b
mode
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
B
1 2 3 4 5 6 7 8 9 10
A
B
1 2 3 4 5 6 7 8 9 10
Indoor unit
thermostat
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
address
1 2 3 4 5 6 7 8 9 10
a Outdoor unit b Indoor unit
A ON B OFF
Display at LED lighting (blinking)
Flag 1 Flag 2 Flag 3
During Compres- Compres-
compres- sor 1 sor 2
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 unit
No.9 No.10 No.11
unit unit unit
No.17 No.18 No.19
unit unit unit
No.25 No.26 No.27
unit unit unit
No.1 No.2 No.3
unit unit unit
No.9 No.10 No.11
unit unit unit
No.17 No.18 No.19
unit unit unit
No.25 No.26 No.27
unit unit unit
No.1 No.2 No.3
unit unit unit
No.9 No.10 No.11
unit unit unit
No.17 No.18 No.19
unit unit unit
No.25 No.26 No.27
unit unit unit
Displays in order the addresses (1 through 50) of all indoor units connected to the outdoor unit.
* Turn SW4-2 of variable capacity unit off. If SW4-2 is on, constant capacity unit data will be
displayed.
C At factory shipment
Flag 4 Flag 5 Flag 6 Flag 7
SV22/32
21S4 SV1
SV6 CH2, 3 52F
No.4 No.5 No.6 No.7
unit unit unit
No.12 No.13 No.14 No.15
unit unit unit
No.20 No.21 No.22 No.23
unit unit unit
No.28 No.29 No.30 No.31
unit unit unit
No.4 No.5 No.6 No.7
unit unit unit
No.12 No.13 No.14 No.15
unit unit unit
No.20 No.21 No.22 No.23
unit unit unit
No.28 No.29 No.30 No.31
unit unit unit
No.4 No.5 No.6 No.7
unit unit unit
No.12 No.13 No.14 No.15
unit unit unit
No.20 No.21 No.22 No.23
unit unit unit
No.28 No.29 No.30 No.31
unit unit unit
remarks
Flag 8
Flag 8 always lights
Always
at microcomputer
lighting
power ON
21S4b and SV5b
are closed with flag 1
No.8
unit unit
No.16
unit unit
Lights at emergency
stop in IC
Turns off by resetting
No.24
unit unit
No.32
unit unit
No.8
unit unit
No.16
unit unit
Lights at cooling
Blinks at heating
Turns off at stop/fan
No.24
unit unit
No.32
unit unit
No.8
unit unit
No.16
unit unit
Lights at thermostat
on Turns off at
thermostat off
No.24
unit unit
No.32
unit unit
41