Johnson Controls HICM008B21S Service Manual page 41

Event
Activation of
Float Switch
Failure of
Float Switch
Failure of
Drain Pump
Failure of Indoor Unit PCB
1: Refer to Section 3.1.4 (3) above for details.
SM-18003
Cause
Clogging of
High Drain Drainage
Level Up-Slope
Drain Piping
Failure
Contact Failure
Incorrect Connection
Failure
Contact Failure
Incorrect Connection
Check Item
Check drain pan.
Check drainage by
pouring water.
Check continuity
when drain level is low.
Measure resistance
with a tester.
Check connection.
Measure voltage
between CN36 terminals
with a tester.
Measure resistance
with a tester.
Check connection.
Check PCB in
Self-Checking Mode.
1
TROUBLESHOOTING
Action
(Turn OFF Main Switch)
Remove foreign particles
clogging drain pipe.
Replace float switch
if faulty.
Replace and tighten
connector.
Repair connection.
Replace drain pump
if faulty.
Replace and tighten
connector.
Repair connection.
Replace it if faulty.
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