Samsung AC026NNNDKH - Items to Check before Diagnostics; Four Directions Cassette Type

4-10 Samsung Electronics
4-2 Items to check before diagnostics
4-2-1 Four directions cassette type
Error Mode
Cause Measures
Product operation with error
Diagnosis
method
Operation
Defrost
Timer
Filter
Outdoor Unit
compressor
Outdoor
Unit fan
indoor
Unitheat fan
X X X Power reset - operation-off
operation-
off
operation-off -
X X X
Error of room
temperature sensor
in the indoor unit
(Open/Short)
• Check indoor temperature
sensor connection.
• Check indoor temperature
sensor’s resistance value to
see if it’s short/open.
operation-off
operation-
off
operation-off page 4-17
X X
Error of heat exchanger
IN/OUT sensor in the
indoor unit
(Open/Short)
• Check EVA IN/OUT sensor
connection.
• Check EVA IN/OUT sensor’s
resistance
value to see if it’s short/
open.
operation-off
operation-
off
operation-off page 4-18
X X X
Error of fan motor in the
indoor unit
• Check the connection of
motor connector
• Check the speed of the
motor fan
operation-off
operation-
off
operation-off page 4-19
X X
Error of the outdoor
temperature sensor
Error of the condensor
temperature sensor
Error of the discharge
temperature sensor
• Check outdoor temperature
sensor connection.
• Check outdoor
temperature sensor’s
resistance value to see if it’s
short/open.
operation-off
operation-
off
operation-off -
X X
No communication for
2 minutes between
indoor
and outdoor unit
(communication error
for more than 2
minutes)
• Check connection between
indoor and outdoor unit
communication cables
operation-off
operation-
off
operation-off page 4-20
X Error of outdoor unit
• Check error occurred with
outdoor unit.
operation-off
operation-
off
operation-off -
X X
Detection of the
float switch
• Check float switch
connection.
• Check whether the drain
has been filled with water.
operation-off
operation-
off
operation-off page 4-21
X EEPROM error
• Check if there is damage
with EEPROM component.
operation-off
operation-
off
operation-off page 4-22
EEPROM option error
• Check the indoor model
to set the options.
• Inspection for matc
between indoor and
outdoor machine models
operation-off
operation-
off
operation-off -
X X MDS-kit error
-.Check the wire
connection
-. Check the MDS-KIT
-.Check the indoor PBA
operation-on
operation-
on
operation-on page 4-49
X
Miss matching error
between indoor unit
and outdoor unit
-. Check the EEPROM.
-. Check the indoor unit
& outdoor unit's micom
version
operation-off
operation-
off
operation-off -
: On : Blink X : Off