Troubleshooting; Fan Failure Codes - Daikin MicroTech III Operation Manuals

Troubleshooting

Fan Failure Codes

HLL = Hall Sensor Error
First occurrence:
Power fluctuations may be responsible.
Corrective: Reset the failure; re-start the motor and observe it. If applicable, filter out the source of the disturbing
voltage .
Repeated occurrence:
Question:
Do other fans show the same failure?
Yes: Systematically search for voltage peaks .
No: It seems to be a hardware problem of the fan . Fan need to be replaced .
TFEI = Electronics Interior Overheated
First occurrence:
Too high ambient temperature may be responsible .
Question:
• Could ambient temperature have been too high?
• Is it possible to connect the fan to EC Control in order to display the temperature? If so, is the
displayed temperature within the expected temperature range?
Corrective: If the displayed temperature is above 95°C (the electronics switches off at 105°C), double-check the
ambient temperature in each operating mode .
Reset the failure; re-start the motor and observe it .
Repeated occurrence:
Question:
Do other fans show the same failure?
Yes: Systematically search for the cause of excessive ambient temperature . Perhaps use a data logger
or read out the electronics temperature via EC Control .
No: It seems to be a hardware problem of the fan . Fan need to be replaced .
TFM = Motor Overheated
First occurrence:
Excessive ambient temperature may be responsible .
Question: • Could ambient temperature have been too high? Or is the motor overloaded?
• Is it possible to connect the fan to EC Control in order to display the motor temperature?
• Is the displayed temperature within the expected temperature range?
Corrective: If the displayed temperature is too high:
• Double-check the motor temperature in each operating mode .
• Check of the fan load: Measure the input power at max . load/ operating point and compare the
measured value with nominal data on the label . Is there any discrepancy?
• Reset the failure; re-start the motor and observe it .
Repeated occurrence:
Question: Do other fans show the same failure?
Yes: systematically search for the cause of excessive ambient temperature . Perhaps use a data logger
or read out the electronics temperature via EC Control .
No: It seems to be a hardware problem of the fan . Fan need to be replaced .
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