8.3 Troubleshooting by alarm code
8.3.1 Alarm codes
Alarm code
01
Activation of the Indoor unit protection device.
•
The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
•
The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the contact between # 1 and # 2 of CN14 is not closed more than 120 seconds during
the cooling, fan or heating operation.
THM1 THM2 THM3 THM4 THM5 CN1925
CN3 CN4 CN14
Example of RCD, RPI and RPC Types
GND
Is DC12V applied between #2 and GND
of CN14?
(CN14 is not mounted in RPK type.)
Activation of Safety Device
(such as Float Switch FS) or
Incorrect Wiring
Faulty PCB
Yes
No
PCB1: Control PCB in Outdoor Unit
PCB: Indoor Unit PCB
Cause
Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Activation of
Float Switch
Check continuity when
drain level is low.
Check drain pan.
High Drain
Level
Faulty
Float Switch
Clogging of
Drainage
Remove clogged
foreign particles.
Replace float switch
if faulty.
Fault
Measure resistance
by tester.
Repair looseness and
replace connector.
Faulty
Contacting
Check connections.
Repair connection.
Faulty
Connection
Check PCB by
self-checking.
Replace it if faulty.
Faulty Indoor Unit PCB
Alarm Code
Indoor Unit No. for Failure
<Outdoor Unit PCB1 Display Indication>
8 Troubleshooting
170
SMGB0065 rev. 1 - 12/2010
