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Procedure 11
11. CHECK / REPLACE THE FAN
Fan motor: Code:
D0040012;
Model:
YDK25-4D(YDK20-4F1)
Tools:
Screw driver PH2 & PH 3; Pliers; Spanners S10; S12; S13
Risk of electric shock!
Disconnect the HPWH from the main electric supply
INITIAL CHEK OF VENTILATOR:
1) Clean the ducts and the filter (in some models)
2) Check if a foreign body blocks the fan rotation. In this case, remove
the foreign body.
3) If the fan is blocked not because of a foreign part proceed with the FAN
CAPACITOR CHEK/REPLACEMENT
FAN CAPACITOR CHEK / REPLACEMENT:
1) With multimeter measure the resistance of the fan capacitor
(Ω): if the
value is 0, proceed with the replacement of ventilator capacitor itself
2) If capacitor is OK, procced with a FAN REPLACEMENT
FAN REPLACEMENT:
1) Switch off the HPWH
2) Open the PCB box as per procedure 1.
3) Tear up the cable bundle containing the cable of the Fan
4) On PCB terminal OUT4 (Fig: pr.11.1), disconnect the cable of Fan. Do
the same with cables to the fan capacitor Fig: pr.11.2
5) Pull the cables out
6) Dismantle Fan diffusor by unscrewing 4 screws No1 (Fig: pr.11.3)
7) Dismantle front panel of fan volute by unscrewing 11 screws No2 (Fig:
pr.11.5)
8) Disassemble the plastic propeller by unscrewing a nut S10 (Fig:
pr.11.6). Counterclockwise tighten / clockwise
– unscrew!
9) Disassemble the fan motor by unscrewing screws No3, 4 pieces.
10) Fan motor is released
11) Replace it with a new one
12) Assemble everything at the reverse order, do not forget to tighten
again the cables into the bundle. Assure that no cables are in contact
with moving parts or sharp edges.
Fig: pr.11.1: Fig: pr.11.2:
Fig: pr.11.3: Fig: pr.11.4:
Fig: pr.11.5:
Screws No1
4 pieces
FAN
CAPACITOR
