Daikin VRVIII-S, Service Manual

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Troubleshooting by Indication on the remote control SiENBE34-703
144 Troubleshooting
3.18 “
E7
” Malfunction of Outdoor Unit Fan Motor
remote control
Display
E7
Applicable
Models RXYSQ4~6P
Method of
Malfunction
Detection Malfunction of fan motor system is detected according to the fan speed detected by hall IC
when the fan motor runs.
Malfunction
Decision
Conditions ! When the fan runs with speed less than a specified one for 6 seconds or more when the fan
motor running conditions are met
!
When malfunction is generated 4 times, the system shuts down.
Supposed
Causes ! Malfunction of fan motor
! The harness connector between fan motor and PC board is left in disconnected, or faulty
connector
! Fan does not run due to foreign matters tangled
! Clearing condition: Operate for 5 minutes (normal)
! Open phase L1 or open phase N.
Troubleshooting
Connect the connector.
Remove the obstacle.
Correct the power supply
voltage.
If L1 and N phases are
open, replace the switch
box.
Replace outdoor unit PC
board.
If the F4U has blown out,
replace the fuse.
If the F1U has blown out,
replace the inverter PC
board assy.
Replace the fan motor.
Are the
resistances between pins
above judgment?
Check No. 3
Check on connector of fan
motor (Refer to information
on P.195)
If the F4U has blown out,
replace the fuse.
If the F1U has blown out,
replace the inverter PC
board assy.
Replace the fan motor.
NO
YES
YES
YES
Connector of fan motor
is disconnected.
Can the fan be turned
smoothly with hand after
disconnect the connector
of fan motor?
Is there any
obstacle around
the fan?
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Has either the fuse F4U on
the control PC board (A1P)
or the fuse F1U on the
inverter PC board (A2P)
blown out?
Has the
voltage between L1
and N on the power supply
terminal board X1M fallen within the
range of 220 to 240V±10%
(50 Hz)?
Has either the fuse F4U
on the control PC board
(A1P) or the fuse F1U on
the inverter PC board
(A2P) blown out?
Caution
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES