Table of Contents
Advertisement
Block level
Check
Check
Block
code
code
Indoor PC
board
Refrigerant
system
Contents detected by the check codes
supply is turned off. Therefore, contents of operations in the past are all displayed.
Table 9-2-4
Diagnosis function
Conditioner
Symptom
status
Thermo sensor
Continued
short/break.
operation
Heat exchanger
Continued
sensor short/break.
operation
Indoor fan lock,
All off
abnormality of
indoor fan.
Abnormality of
All off
other indoor unit PC
board.
1) Gas shortage.
All off
(gas leak)
2) Other refrigerant
cycle trouble.
3) Heat exchanger
sensor off/break/
short.
4) Overload relay
"
"
"
"
to
are stored in memory of the microcomputer even if the power
– 37 –
Air
Condition
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 PC board.
1. Check heat exchanger
sensor.
2. If it is OK, check PC 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,
PC board is OK, check
motor.
Replace PC board.
1. Check gas quantity.
(check gas leakage)
2. If it is OK, check heat ex-
changer sensor.
3. If heat exchenger sensor is
OK. check overload relay and
thermostat for compressor.
4. If overload relay is OK, check
refrigerant cycle.
5. If refrigerant cycle is OK,
check PC board.
- Quick Links:
- Specifications
- Indoor Unit
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
