LG RCAW Operation & Maintenance Manual page 75

Displayed Alarm
Message
• FAN2B3B magnetic
contactor contact input
or overload relay con-
FAN2B3B Alarm
tact input (switch off)
after the compressor
run
• FAN4B5B magnetic
contactor contact input
or overload relay con-
FAN4B5B Alarm
tact input (switch off)
after the compressor
run
• Compressor discharge
Exhaust temp
temperature sensor
sensor close
close
• Compressor discharge
Exhaust temp
temperature sensor
sensor open
open
CHW In temp
• Chilled water in temper-
sensor close
ature sensor close
CHW In temp
• Chilled water in temper-
sensor open
ature sensor open
CHW out temp
• Chilled water out tem-
sensor close
perature sensor close
CHW out temp
• Chilled water out tem-
sensor open
perature sensor open
Condensate temp
• Condensation tempera-
close
ture sensor close
Condensate temp
• Condensation tempera-
open
ture sensor open
Ambient temp
• Ambient temperature
close
sensor close
Ambient temp
• Ambient temperature
open
sensor open
Recognition
• Malfunction of FAN2B3B
• Condenser FAN2B3B overload
• Malfunction of FAN4B5B
• Condenser FAN4B5B overload
• Sensor line is short
• Malfunction of Sensor
• Sensor line is cut out or loose
• Malfunction of Sensor
• Sensor line is short
• Malfunction of Sensor
• Sensor line is cut out or loose
• Malfunction of Sensor
• Sensor line is short
• Malfunction of Sensor
• Sensor line is cut out or loose
• Malfunction of Sensor
• Sensor line is short
• Malfunction of Sensor
• Sensor line is cut out or loose
• Malfunction of Sensor
• Sensor line is short
• Malfunction of Sensor
• Sensor line is cut out or loose
• Malfunction of Sensor
Possible Cause
Table 26
Operation & Maintenance Manual 75
Trouble Shooting
Possible Remedy
• Replace FAN2B3B motor, check
magnetic contactor or relay
• Check FAN2B3B lock
• Replace FAN4B5B motor, check
magnetic contactor or relay
• Check FAN4B5B lock
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor
• Check sensor line
• Change sensor