E7" Malfunction Of Outdoor Unit Fan Motor - Daikin VRVIII-S Service Manual

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