Friedrich AS - W126BMS0 Service Manual page 40

Part 4 Trouble Shooting
Inspection Description of
Number Inspection
CH04
Float switch
Check Flow Chart
Check the level of
water (Float moves top
position)
Is it normal ?
Yes
Is the float
switch clean ?
Yes
Check the wire
connection (Open,
Soldered poorly)
Is it normal ?
Yes
Is the resistance of f
loat switch normal
(short) ?
Check Point
1. Check the wire connection. (Open, Soldered poorly) → Repair the connection or change the PCB.
2. Check the resistance of float switch (Abnormal : Open, Normal : short) → Check the float switch.
3. Check the level of water.
Cause of Error
• Float switch open.
(Normal : short)
• Water over flow
No
Check float switch
No
Clean float switch
No
Correct connection
Or re-soldering PCB
No
Change the float switch
- 40 -
Check Point
• The connection of wire (Float switch)
• Indoor unit installation. (Inclination)