Alarm code
23
Abnormal operation of thermistor for discharge gas temperature at the upper part of the
compressor.
•
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 or the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the thermistor is short-circuited (less than 0.9 kΩ) or cut (greater than 5946 kΩ) during
the operation.
Yes
Yes
Set DSW2 on PCB1
correctly.
No
Connect them.
No
Faulty Thermistor.
No
Faulty PCB1
Is the setting of DSW2
on PCB1 right?
Are discharge gas
thermistors (THM8,
THM9) connected to
THM8 (TD1) and
THM9 (TD2) on PCB1?
Yes
Is resistance of
discharge gas thermistors
(THM8 and THM9) same
with characteristic in
right figure?
Position of Thermistor
THM8 (Td1)
for Inverter Drive
RAS-8FSXN to RAS-12FSXN
THM9 (Td2)
for Constant Speed Drive
RAS-14FSXN to RAS-18FSXN
200
100
R25=200kΩ
B=3920k
72.3
14.2
8.32
0
100 120 150
Ambient Temperature (ºC)
Resistance
of Thermistor
(k
Ω
)
Characteristics of Thermistor
PCB1: Control PCB in Outdoor Unit
25
50
Cause
Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Faulty Discharge
Gas Thermistor
Check resistance.
Replace thermistor
if faulty.
Fault
Check wiring to PCB1.
Repair wiring and
connections.
Incorrect Connection
Replace PCB1 and
check operation.
Replace PCB1 if faulty.
Faulty PCB1
Check setting of
DSW2 on PCB1.
Correctly set
DSW2 on PCB1.
Incorrect Setting of DSW2 on PCB1
8 Troubleshooting
202
SMGB0065 rev. 1 - 12/2010
