SiUS041829E
Troubleshooting
Part 6 Service Diagnosis
75
Troubleshooting
Caution
Be s
u
re to t
u
rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Correct the power
s
u
pply.
NO
Check the power s
u
pply
voltage.
T
u
rn off the power and
disconnect the fan motor
connector, then t
u
rn the
power on.
Check No.02
Check the o
u
tp
u
t of the
fan motor connector.
YES
YES
NO
YES
YES
NO
NO
NO
Note: The motor may break when the
motor connector is disconnected
while the power is t
u
rned on.
(Be s
u
re to t
u
rn off the power
before reconnecting the
connector.)
Replace the indoor
fan motor.
Replace the indoor
u
nit PCB (control
PCB).
Replace the indoor
u
nit PCB (control
PCB).
Does the
fan rotate smoothly?
Does the
fan rotate?
Motor
power s
u
pply
voltage 310 ~ 340
VDC?
T
u
rn off the power and
rotate the fan by hand.
T
u
rn on the power and
start operation.
Check No.02
Check the o
u
tp
u
t of the
fan motor connector.
(R22444)
YES
NO
YES
NO
YES
NO
Replace the indoor
fan motor.
Replace the indoor
u
nit PCB (control
PCB).
Replace the indoor
u
nit PCB (control
PCB).
Replace the indoor
u
nit PCB (control
PCB).
Replace the indoor
fan motor.
Stop the fan motor.
YES
Is the
voltage
fl
u
ct
u
ation
within ±10% from
the rated
val
u
e?
Motor
control voltage 15
VDC generated?
Rotation
command voltage
1 ~ 6.5 VDC?
Indoor fan
motor rotation p
u
lse
generated?
Indoor fan
motor rotation p
u
lse
generated?
Summary of Contents for FTXR-T Series
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Page 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E...
