Daikin VRV II RXYQ5MY1B Service Manual page 181

Troubleshooting by Remote Controller
Malfunction Operation
code
Outdoor LA
Unit
LC
P1
P4
System U0
U1
U2
U3
U4
U5
U5
U7
U8
U9
UA
UC
UE
UF
UH
Centralized M1
Control
and
M8
Schedule
Timer
MA
MC
Heat 64
Reclaim
65
Ventilation
68
6A
6A
6F
6H
94
The system operates for malfunction codes indicated in black squares, however, be sure to check and repair.
170
Inspection Unit No.
lamp display
9 9 9
9 9 9
9 9 9
9 9 9
8 7 9
9 9 9
9 9 9
9 9 9
9 9 9
9 9 9
7 8 7
9 9 9
9 9 7
9 9 9
9 9 9
8 8 8
9 9 9
9 9 9
9 9 9
8 or 7 9 9
8 or 7 9 9
8 or 7 9 9
8 or 7 9 9
8 7 9
8 7 9
8 7 9
8 7 9
9 9 9
8 7 9
8 7 9
9 9 9
Malfunction contents
Malfunction of power unit
Malfunction of transmission between inverter and
control PC board
Inverter over-ripple protection
Malfunction of inverter radiating fin temperature rise
sensor
Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
Reverse phase / open phase
Power supply insufficient or instantaneous failure
Check operation is not conducted.
Malfunction of transmission between indoor and
outdoor units
Malfunction of transmission between remote
controller and indoor unit
Failure of remote controller PC board or setting
during control by remote controller
Malfunction of transmission between outdoor units
Malfunction of transmission between master and
slave remote controllers (malfunction of slave remote
controller)
Malfunction of transmission between indoor unit and
outdoor unit in the same system
Excessive number of indoor units etc.
Address duplication of central remote controller
Malfunction of transmission between central remote
controller and indoor unit
Refrigerant system not set, incompatible wiring /
piping
Malfunction of system, refrigerant system address
undefined
PC board defect
Malfunction of transmission between optional
controllers for centralized control
Improper combination of optional controllers for
centralized control
Address duplication, improper setting
Indoor unit's air thermistor error
Outside air thermistor error
Damper system alarm
Damper system + thermistor error
Malfunction of simple remote controller
Malfunction of door switch or connector
Internal transmission error
SiE39-404
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Troubleshooting