Samsung AVXCSH023/032/040CE Service Manual page 105

Troubleshooting
4-2-1-2 4 way, mini 4 way cassette type
■ Error detection and restart
●
When error occurs during operation, indicate a problem with LED flashes, and no other operations but LED stops.
●
When restarting operation with remote controller or switch, it will determine the appropriate error mode after normal operation
■ LED lamp display with error detection
Error type
Power reset
Indoor temperature sensor error
(Open/Short)
Indoor heat exchanger sensor error
Indoor heat exchanger OUT sensor error
Indoor emission temperature sensor error
(Open/Short) : Heater using models
Indoor fan motor error: maintains for
over 15 seconds below 450RPM
Outdoor temperature sensor error
COND sensor error
DISCHARGE sensor error
1. Detect the indoor unit when there is
no communication between the indoor
unit and outdoor unit for 2 minutes.
(When communication error is for
over 2 minutes)
2. The indoor unit receives the
communication error signal from the
outdoor unit
3. The outdoor unit tracking 3 minutes
error
4. When the outdoor unit transmits a
communication error which is caused
by difference between the number of
the installation unit and the number of
communication unit after completion
of tracking. (When communication
error is for over 2 minutes)
4-21
LED lamp display
When indoor and outdoor
power is on again
• Indoor temperature sensor
connector breakaway
• Short of temperature
sensor wire
• Indoor pipe temperature
sensor connector
breakaway
Not drive the indoor fan
motor
Outdoor unit operation
error
Comm. error
Follow-up measures
Causes
Not an error
• Check the indoor
temperature sensor
connector
• Check the temperature
sensor wire
• Check the temperature
sensor connector
breakaway
• Check the connector break-
away
• Check the fan motor lock
• Manage after checking
the error on the outdoor
PCB display window
• Check comm. line
connection
• Check Indoor/outdoor unit
power input
• Check Comm. IC
: On : Flickering
Samsung Electronics
: Off