Daikin VRV II RXYQ5MATL Service Manual page 178

Si39-504
Malfunction
code
Outdoor Unit LA
LC
P1
P4
System U0
U1
U2
U3
U4
U5
U5
U7
U8
U9
UA
UC
UE
UF
UH
Central M1
Remote
Controller
M8
and
Schedule
Timer MA
MC
Heat 64
Reclaim
65
Ventilation
6A
6A
6F
6H
94
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
Troubleshooting
Operation Inspection Unit No.
lamp display
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
8 or 7
9
8 or 7
9
8 or 7
9
8 or 7
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
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
Improper combination of indoor and outdoor units,
9
indoor units and remote controller
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 PC board defect
9
Schedule timer PC board 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
8: ON 7: OFF 9: Blink
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