42
14
Internal temperature sensor fault
Oorzaak
Solution
a)
The ventilation unit detects that the
internal temperature sensor is a)
defective.
The ventilation goes to the maximum
position. Close the frost valve and the
bypass valve. All controls are blocked.
●
Replace the electronics
compartment and perform
commissioning again. Re-register
all controls and sensors.
15
Error temperature sensor drain
Oorzaak
Solution
a)
The ventilation unit detects that the
temperature sensor in the drain is a)
defective.
The ventilation goes to the maximum
position. Close the frost valve and the
bypass valve. All controls are blocked.
●
Replace the
corresponding fan
module.
16
Error temperature sensor supply
Oorzaak
Solution
a)
The ventilation unit detects that the
temperature sensor in the supply is a)
defective.
The ventilation goes to the maximum
position. Close the frost valve and the
bypass valve. All controls are blocked.
●
Replace the
corresponding fan
module.
17
Fault valve zone 1
Oorzaak
Solution
a)
The ventilation unit detects that the
damper for zone 1 is not, or not properly
connected or defective.
The ventilation unit functions normally,
but the air flow may be out of balance.
●
Connect the relevant valve correctly.
●
Replace the valve in question.
18
Fault valve zone 2
Oorzaak
Solution
a)
The ventilation unit detects that the
damper for zone 2 is not, or not properly
connected or defective.
The ventilation unit functions normally,
but the air flow may be out of balance.
●
Connect the relevant valve correctly.
●
Replace the valve in question.
Summary of Contents for HRU 400
Page 1: ...Itho Daalderop HRU 400 Installation use A...
Page 2: ...Original document...