What To Check Before Diagnosis; Lamp Combination Expression Method Display (Cassette Type Indoor Unit) - Samsung AVXCSH023/032/040CE Service Manual

4-2 What to check before diagnosis

4-2-1 Lamp combination expression method display (cassette type indoor unit)

4-2-1-1 Slim 1 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
Mixed operation error
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 out-
door 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 com-
munication unit after completion
of tracking. (When communication
error is for over 2 minutes)
4-19
LED lamp display
Green Red
Causes
When indoor and outdoor Not an error
power is on again
• Indoor temperature sensor • Check the indoor
connector breakaway temperature sensor
• Short of temperature connector
sensor wire • Check the temperature
sensor wire
• Indoor pipe temperature • Check the temperature
sensor connector sensor connector
breakaway breakaway
Operate cooling & heating
• Change the operation mode
operation simultaneously
• Check the connector
Not drive the indoor fan
breakaway
motor
• Check the fan motor lock
• Manage after checking
Outdoor unit operation
the error on the outdoor
error
PCB display window
• Check comm. line
Comm. error
connection
• Check Indoor/outdoor unit
power input
• Check Comm. IC
Follow-up measures
: On : Flickering : Off
Samsung Electronics