– 39 –
Check
code
Check
code
Block
Indoor P.C.
board
Cable
connection
Refrigerant
system
Table 9-2-4
Condition
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Indicated when
detected abnormal
Judgment and action
1. Check thermo. sensor.
2. If it is OK, check P.C. board.
1. Check heat exchanger
sensor.
2. If it is OK, check P.C. board.
1. Disconnect the power plug
from AC outlet, and pull out
the connector (CN10) for the
motor, then connect the plug
of AC power cord again and
turn the power on.
2. Check the voltage between
pin 1 and 2 of the connector
(CN10).
3. If the output voltage is 35V,
P.C. board is OK, check
motor.
Replace P.C. board.
1. Check connective cable
correct if wiring is wrong.
2. If connective cable is OK,
check outdoor heat ex-
changer sensor.
1. Check compressor.
2. If it is OK, check P.C. board.
Diagnosis functionBlock level
Symptom
Thermo. sensor
(TA) short/break.
Indoor heat
exchanger sensor
(TC) short/break.
Indoor fan lock,
abnormality of
indoor fan.
Abnormality of
other indoor unit
P.C. board.
1) Wrong wiring or
disconnection of
connective cable.
2) Outdoor heat
exchanger
sensor (TE)
short/break.
Compressor break
down.
Air
conditioner
status
Continued
operation
Continued
operation
All off
All off
All off
All off
Contents detected by the check codes to are stored in memory of the microcomputer even if the power
supply is turned off. Therefore, contents of operations in the past are all displayed.
“ ”
“ ”
To Next Page
Loading...
