10 Troubleshooting
Troubleshooting procedure
SMGB0091 rev.2 - 11/2015
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10
10.2.3 Troubleshooting by alarm code
Alarm code
01
Activation of the safety device (flow switch) in the indoor unit (except RPK series)
This alarm code is displayed when the contact between #1 and #2 of CN14 is not closed over 120 seconds during the
cooling process, the heating process or the fan operation.
Faulty IU PCB
Is DC12V applied
between #2 of CN14 and
GND?
Activation of float switch
(FS) or incorrect wiring
No
Yes
Indication of Outdoor Unit PCB
Indoor Unit No.
for Malfunction
Alarm Code
Indoor unit number
for malfunction
Alarm code
Indication of outdoor unit PCB
If all the above checks have been overcome, see the
status of the following item:
•
Check if float switch (FS) connected to the CN14 is
open/activated by using a tester.
CN14: Safety devices line scheme
Phenomenon
Cause
Check item
Action
(Turn OFF the main switch)
Activation of the float
switch
High Drain Level
Clogging of the
drainage
Check the drain pan
Remove the clogged foreign
particles
Faulty float switch
Fault
Check the continuity when
the drain level is low
Replace the float switch if
faulty
Faulty contacting
Measure the resistance by
means of the tester
Fix the looseness and
Replace the connector
Faulty connection
Check the connections
Repair the connection
Faulty indoor unit PCB (except RPC)
Check PCB by means of
the self-check mode *1)
Replace PCB if faulty
Faulty wiring (RPC only)
Check weather short-
circuited connector is
connected to CN-14)
Connect it correctly
?
N O T E
“Self-checking procedure of PCB by means of the remote control switch”