Single Zone Service Manual - General

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