Daikin Modular L Smart, Service Manual

Page: 24 / 90

ESIE19-06 | Part 2. Troubleshooting 2.2. Error based troubleshooting
Page 24 21/01/20 | Version 1.1
Modular L Smart
2.2.1.3. “64” – Air return thermistor faulty
2.2.1.4. “65” – Air intake thermistor faulty
Trigger Effect Reset
Air return sensor abnormal signal. Unit will not stop operating.
Control will use default value for air return
sensor. Automatic reset.
To remove warning from main history,
push the ON/OFF button on the remote
controller for 5 seconds in the check
mode.
Possible cause Check Corrective action
HRV unit - Electrical components
Faulty air return sensor. Read actual air return sensor by user
interface.
Erase the error record from the remote
controller. Replace the air return sensor.
Faulty main PCB. Check HAP on main PCB is blinking.
Check connector air intake sensor cor-
rectly mounted. Replace main PCB.
Reconnect plug of air return sensor.
External factor (e.g. electrical noise) (error
disappears after power reset, but returns
after a while). Check for source which could cause elec-
trical interference. Avoid electrical interference.
Trigger Effect Reset
Air intake sensor abnormal signal. Unit will not stop operating.
Control will use default value for air intake
sensor. Automatic reset.
To remove warning from main history,
push the ON/OFF button on the remote
controller for 5 seconds in the check
mode.
Possible cause Check Corrective action
HRV unit - Electrical components
Faulty air intake sensor. Read actual air intake sensor by user
interface.
Erase the error record from the remote
controller. Replace the air intake sensor.
Faulty main PCB. Check HAP on main PCB is blinking.
Check connector air intake sensor cor-
rectly mounted. Replace main PCB.
Reconnect plug of air intake sensor.
External factor (e.g. electrical noise) (error
disappears after power reset, but returns
after a while). Check for source which could cause elec-
trical interference. Avoid electrical interference.