Troubleshooting - Daikin SkyAir Super Inverter 70 D Series Service Manual

Troubleshooting by Remote Controller Display / LED Display

Troubleshooting

140
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn off the power supply.
Is there any
foreign matter
around the fan?
NO
3 HP or less
YES
Is the
harness from the fan
motor correctly connected to
X20A connector on
A1P?
YES
YES
With
transfer connector
between the fan motor and
A3P disconnected, can
the fan be easily
turned by
hands?
YES
Check No. 8
(For FHYCP100~140D only)
Check for the fan motor
connector.
Does
the resistance
between U,V,W phases
of fan motor balance each
other? Is there short circuit
between U,V,W
YES
phases
respectively?
YES
Check No. 9
(For FHYCP100~140D only)
Check for the fan motor
connector.
Is
the resistance
between Vcc-UVW of the
motor signal line balanced
with that between
GND-UVW?
YES
YES
Is
the harness
from the fan motor
NO
correctly connected with the
harness from X1A and X2A
connectors on
A3P?
YES
Is
the relaying wire
harness from the fan motor
correctly connected to X1A
and X2A connectors
on A3P?
NO
YES
Is
the harness
connecting X20A connector
on A1P and X3A connector
on A3P correctly
connected?
NO
NO
NO
Remove the foreign matter.
NO
Connect correctly.
NO
Connect correctly.
Connect correctly.
NO
Connect correctly.
Replace the fan motor.
Replace the fan motor.
Replace the fan motor.
Replace the indoor unit PC board.
Troubleshooting
SiE25-110
(S2578)