Daikin EHYHBH05AAV3, Service Manual

Page: 121 / 170

ESIE13-02A Error Codes: Outdoor Units
121 Part 4 – Troubleshooting
4
3
4
5
4
4.9
“H9, J3, J5, J6, J7, J8”
Thermistor or Related Abnormality (Outdoor Unit)
Remote controller
display
H9, J3, J5, J6, J7, J8
Method of
malfunction
detection Abnormality is detected according to the temperature detected by each individual thermistor.
Malfunction
decision conditions When thermistor is disconnected or short-circuited during operation
Supposed causes Faulty thermistor
Faulty connection of connector
Faulty outdoor unit PC board (control PC board)
Troubleshooting
(*) See also "Check No.4 - Resistance Conversion Table (Ambient, Coil, Fin)" on page 153.
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
YES
YES
NO
Check connectors for
connection.
Connect correctly.
Replace the thermistor.
* Replace the outdoor unit PC board
(A1P) ERHQ***V3* / ERLQ***V3*
* Replace the control PC board (A1P)
ERHQ***W1* / ERLQ***W1*
Remove thermistor from
outdoor unit PC board,
then measure the
resistance using a tester.
H9 : Malfunction of outdoor temperature thermistor system
J3 : Malfunction of discharge pipe thermistor system
J5 : Malfunction of suction pipe thermistor system
J6 : Malfunction of heat exchange thermistor
J7: Malfunction of subcooling heat exchanger thermistor
J8: Malfunction of liquid thermistor
Normal?
Normal?
NO