Airwell DLS 43 DCI, Service Manual

Page: 132 / 182

13-15
TROUBLESHOOTING
SM DLSDCI 3-A.1 GB
13.5.5 Checking PFC Chock coil
1) Check PFC chock connections – repair if needed.
2) Visually check to see any burn marks on the wires – replace the chock(s) if needed.
3) Disconnect the chock from the driver and check if the 2 ending wires of each chock are shorted
(continuity check) – if they are NOT shorted replace the chock(s), if they are shorted – check the
driver (
13.5.4 ).
Replacing PFC chock - ( 14.1.17 )
13.5.6 Checking DC Capacitors
1) Check visually for burn marks on the capacitor PCB and the capacitors for swelling casing –
replace if needed.
2) When power is ON - Check that red led is ON, if not check voltage b and - poles to be
according table:
Unit Voltage
GC036-43 / INV40-50 380±50VDC
YAD036-42-60-H13 / INV40T/50T/60T 560 ±5 0VDC
YBD042-60-H11 310 ±5 0VDC
3) When power is OFF - Check capacitance b and – poles, should be according table :
Unit Capacitance
GC036-43 / INV40-50 2820±560μF
YAD036-42-60-H13 / INV40T/50T/60T 1360 ±27 0μF
YBD042-60-H11 3360 ±67 0μF
Replacing driver - (14.1.18)
13.5.7 Checking fuse on Main Board
If the 3.15A fuse on the main Board is burnt check the outdoor fans or any other peripheral that can
cause a short:
1) In case of a problematic peripheral - replace it.
2) In case no problematic peripheral replace the burnt fuse.
3) In case of frequent burning fuse, replace the controller.
Replacing main board - ( 14.1.13 )
13.5.8 Checking Outdoor Fan Motor
13.5.8.1. YBD018-027
Check motor capacitor.
Check voltage to motor, should be 230-130VAC. If voltage is not in range, replace the motor.
Check that OMT sensor reading is OK.
If motor is Ok, replace the controller.
13.5.8.2. YBD030
Check fan connection wiring.
Rotate the fan slowly by hand, the fan should rotate easiely, if not, replace the motor.
Check resistance between each phase, all should be about the same 0.8-1.5Ø.
Check that OMT sensor reading is OK.
If motor is Ok, replace the controller.