Mitsubishi Electric CITY MULTI PQRY-P250 Installationshandbuch Seite 29

4. Remote controller
Check code
6101 Unreadable response receiving error
6600 Duplicated unit address setting
6602 Transmission error (Transmission processor hardware
error)
6603 Transmission error (Transmission route BUSY)
2 Diagnostic switch (SW1) and the service LED on multi-controller board of indoor unit can be used to judge a malfunction of heat source
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
Check
B
indoor unit
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
Indoor unit
B
mode
1 2 3 4 5 6 7 8 9 10
b
A
Indoor unit
B
mode
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
Indoor unit
B
thermostat
1 2 3 4 5 6 7 8 9 10
a Heat source unit
A ON B OFF
Trouble
Display at LED lighting (blinking) Remarks
Flag 1 Flag 2 Flag 3
During Crank
compres- case 21S4
sor run heater
0000 to 9999 (Alternate display of address and error code)
SV5 SV6 SV71
No.1 No.2
unit unit
No.9 No.10 No.11
unit unit
No.1 No.2
unit unit
No.9 No.10 No.11
unit unit
No.1 No.2
unit unit
No.9 No.10 No.11
unit unit
b Indoor unit
C At factory shipment
Check code
6606 Transmission and reception error (Communication trou-
ble with transmission processor)
6607 Transmission and reception error (No ACK error)
6608 Transmission and reception error (No responsive frame
error)
Flag 4 Flag 5 Flag 6
SV1 SV2 SV3
SV72 SV73
No.3 No.4 No.5 No.6
unit unit unit unit
No.12 No.13 No.14
unit unit unit unit
No.3 No.4 No.5 No.6
unit unit unit unit
No.12 No.13 No.14
unit unit unit unit
No.3 No.4 No.5 No.6
unit unit unit unit
No.12 No.13 No.14
unit unit unit unit
Trouble
Flag 7 Flag 8
Always
SV4
lighting
Flag 8 always lights
at microcomputer
power ON
SSR
No.7 No.8
unit unit
Lights at emergency
stop in IC and BC
Turns off by resetting
No.15 No.16
unit unit
No.7 No.8
unit unit
Lights at cooling
Blinks at heating
Turns off at stop/fan
No.15 No.16
unit unit
No.7 No.8
unit unit
Lights at thermostat
on Turns off at
thermostat off
No.15 No.16
unit unit
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