Items To Check Before Diagnostics; Four Directions Cassette Type - Samsung AC026NNNDKH 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 X
X
X X
X
X
X
X X
X X
X
4-10
Cause
X Power reset -
• Check indoor temperature
Error of room
temperature sensor
X • Check indoor temperature
in the indoor unit
(Open/Short)
• Check EVA IN/OUT sensor
Error of heat exchanger
IN/OUT sensor in the • Check EVA IN/OUT sensor's
X
indoor unit
(Open/Short)
• Check the connection of
Error of fan motor in the
X
indoor unit • Check the speed of the
Error of the outdoor • Check outdoor temperature
temperature sensor
Error of the condensor • Check outdoor
X
temperature sensor
Error of the discharge
temperature sensor
No communication for
2 minutes between
indoor • Check connection between
X and outdoor unit
(communication error
for more than 2
minutes)
• Check error occurred with
Error of outdoor unit
• Check float switch
Detection of the
float switch • Check whether the drain
• Check if there is damage
X EEPROM error
• Check the indoor model
EEPROM option error • Inspection for matc
-.Check the wire
connection
MDS-kit error
-. Check the MDS-KIT
-.Check the indoor PBA
-. Check the EEPROM.
Miss matching error
-. Check the indoor unit
between indoor unit
and outdoor unit
Measures
Outdoor Unit
compressor
operation-off
sensor connection.
operation-off
sensor's resistance value to
see if it's short/open.
connection.
operation-off
resistance
value to see if it's short/
open.
motor connector
operation-off
motor fan
sensor connection.
operation-off
temperature sensor's
resistance value to see if it's
short/open.
indoor and outdoor unit operation-off
communication cables
operation-off
outdoor unit.
connection.
operation-off
has been filled with water.
operation-off
with EEPROM component.
to set the options.
operation-off
between indoor and
outdoor machine models
operation-on
operation-off
& outdoor unit's micom
version
Product operation with error
Outdoor indoor
Unit fan Unitheat fan
operation-
operation-off
off
operation-
operation-off page 4-17
off
operation-
operation-off page 4-18
off
operation-
operation-off page 4-19
off
operation-
operation-off
off
operation-
operation-off page 4-20
off
operation-
operation-off
off
operation-
operation-off page 4-21
off
operation-
operation-off page 4-22
off
operation-
operation-off
off
operation-
operation-on page 4-49
on
operation-
operation-off
off
: On
Samsung Electronics
Diagnosis
method
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: Blink X : Off