Daikin FCQ18PVJU Service Manual page 87

SiUS28-902_a
Malfunction
code
Outdoor Unit LA
LC
P4
System U0
U1
U2
U3
U4
U5
U5
U7
U8
UE
UF
UH
Centralized UE
Remote
Controller
M1
and
Schedule M8
Timer
MA
MC
Heat 64
Reclaim
65
Ventilation
68
6A
6A
6F
94
The system operates for malfunction codes indicated in gray squares, however, be sure to check and repair.
Troubleshooting
Operation Inspection Unit No.
lamp display
l l
l l
k l
k h
l l
l l
l l
l l
l l
h k
l l
l l
l l
l l
l l
l l
k or h l
k or h l
k or h l
k or h l
k h
k h
k h
k h
l l
k h
l l
Troubleshooting by Remote Controller
Malfunction contents
l
Malfunction of power unit
l
Malfunction of transmission between inverter and
control P.C.B.
k
Malfunction of inverter radiating fin temperature rise
sensor
l
Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
l
Reverse phase / open phase
l
Power supply insufficient or instantaneous failure
l
Check operation not executed
l
Malfunction of transmission between indoor units
and outdoor units
l
Malfunction of transmission between remote
controller and indoor unit
h
Failure of remote controller P.C.B. or setting during
control by remote controller
l
Malfunction of transmission between outdoor units
h
Malfunction of transmission between main and sub
remote controllers (malfunction of sub remote
controller)
l
Malfunction of transmission between centralized
remote controller and indoor unit
l
System is not set
l
Malfunction of system, refrigerant system address
undefined
l
Malfunction of transmission between centralized
remote controller and indoor unit
l
P.C.B. defect
l
Malfunction of transmission between optional
controllers for centralized control
l
Improper combination of optional controllers for
centralized control
l
Address duplication, improper setting
l
Indoor unit's air thermistor error
l
Outside air thermistor error
l
Malfunction of HVU
l
Damper system alarm
l
Damper system + thermistor error
l
Malfunction of simple remote controller
l
Internal transmission error
k: ON h: OFF l: Blink
Page
Referred
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129
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131
133
134
136
136
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137
138
140
141
143
145
146
147
149
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