Items To Check Before Diagnostics; Four Directions Cassette Type - Samsung AC026JNNCEH Service Manual

4-2 Items to check before diagnostics

4-2-1 Four directions cassette type

Error Mode
Operation Defrost Timer Filter
X X X Power reset
Error of room temperature sensor in the indoor
X X X
unit (Open/Short)
Error of heat exchanger IN/OUT sensor in the
X X
indoor unit (Open/Short)
X X X Error of fan motor in the indoor unit
Error of the outdoor temperature sensor
X X Error of the condensor temperature sensor
Error of the discharge temperature sensor
No communication for 2 minutes between indoor
X X and outdoor unit (communication error for more
than 2 minutes)
X Error of outdoor unit
X X Detection of the float switch
X EEPROM error
EEPROM option error
X X
MDS-kit error
Samsung Electronics
Cause
-
• Check indoor temperature sensor connection.
• Check indoor temperature sensor's resistance value to see if it's short/open.
• Check EVA IN/OUT sensor connection.
• Check EVA IN/OUT sensor's resistance value to see if it's short/open.
• Check the connection of motor connector
• Check the speed of the motor fan
• Check outdoor temperature sensor connection.
• Check outdoor temperature sensor's resistance value to see if it's short/open.
• Check connection between indoor and outdoor unit communication cables
• Check error occurred with outdoor unit.
• Check float switch connection.
• Check whether the drain has been filled with water.
• Check if there is damage with EEPROM component.
• Check the indoor model to set the options.
• Inspection for match between indoor and outdoor machine models
-.Check the wire connection
-. Check the MDS-KIT
-.Check the indoor PBA
Measures
Outdoor Unit
compressor
operation-off
operation-off
operation-off
operation-off
operation-off
operation-off
operation-off
operation-off
operation-off
operation-off
operation-on
Product operation with error
Outdoor Unit indoor Unitheat
fan fan
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-off operation-off
operation-on operation-on
Diagnosis method
-
page 4-17
page 4-18
page 4-19
-
page 4-20
-
page 4-21
page 4-22
-
page 4-49
: On : Blink X : Off
4-9