Daikin RXYQ72 Serivce Manual page 128

SiUS39-601
Malfunction Operation
code
Outdoor LA
Unit
LC
P1
P4
PJ
System U0
U1
U2
U3
U4
U5
U5
U7
U8
U9
UA
UC
UE
UF
UH
Central M1 8 or 7
remote
Control
M8 8 or 7
ler and
Schedu
MA 8 or 7
le
Timer
MC 8 or 7
Heat 64
Reclai
65
m
6A
Ventilat
ion 6A
6F
6H
94
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
Troubleshooting
Inspection Unit No.
lamp display
9 9
9 9
9 9
9 9
9 9
8 7
9 9
9 9
9 9
9 9
9 9
7 8
9 9
9 9
9 9
9 9
8 8
9 9
9 9
9 9
9
9
9
9
8 7
8 7
8 7
9 9
8 7
8 7
9 9
Malfunction contents
Malfunction of power unit
9
Malfunction of transmission between inverter and
9
control PC board
Inverter over-ripple protection
9
Malfunction of inverter radiating fin temperature rise
9
sensor
Faulty field setting or faulty combination of PC board
9
Low pressure drop due to refrigerant shortage or
9
electronic expansion valve failure
Reverse phase / open phase
9
Power supply insufficient or instantaneous failure
9
Check operation is not conducted.
9
Malfunction of transmission between indoor and
9
outdoor units
Malfunction of transmission between remote
9
controller and indoor unit
Failure of remote controller PC board or setting
7
during control by remote controller
Malfunction of transmission between outdoor units
9
Malfunction of transmission between main and sub
7
remote controllers (malfunction of sub remote
controller)
Malfunction of transmission between indoor unit and
9
outdoor unit in the same system
Excessive number of indoor units etc.
9
Address duplication of central remote controller
8
Malfunction of transmission between central remote
9
controller and indoor unit
Refrigerant system not set, incompatible wiring /
9
piping
Malfunction of system, refrigerant system address
9
undefined
Central remote controller or schedule timer PC board
9
defect
Malfunction of transmission between optional
9
controllers for centralized control
Improper combination of optional controllers for
9
centralized control
Address duplication, improper setting
9
Indoor unit's air thermistor error
9
Outside air thermistor error
9
Damper system alarm
9
Damper system + thermistor error
9
Malfunction of simple remote controller
9
Malfunction of door switch or connector
9
Internal transmission error
9
Troubleshooting by Remote Controller
Page
Referred
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