Troubleshooting - Daitsu FDHD-V-AC MOTOR Series Installation And Maintenance Manual

High pressure duct
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Troubleshooting

Symptoms
The fan coil does not
start up
Insufficient output
Noise and vibrations
Cause
No voltage
Mains switch in the "OFF position
Faulty room control
Faulty fan
Filter clogged
Air flow obstructed
Room control regulation
Incorrect water temperature
Air present
Contact between metal parts
Loose screws
Remedy
- Check for presence of voltage
- Check fuse on board
- Place in the "ON" position
- Check the room control
- Check fan motor
- Clean the filter
- Remove obstacles
- Check the room air sensor
- Check the water source
- Check the air vent
- Check for loosening parts
- Tighten screws
SK2019 EU FDHD-V/P-AC-001
Page 46 of 48

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