Airwell DLF 18 DCI, Technical Manual

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13-1
4
TROUBLESHOOTING
SM DL
F 1
-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.