ZIEHL-ABEGG ECblue Assembly Instructions

9 Diagnostics / Faults
9.1 Trouble shooting
Type of error Possible cause Remedial measures
Fan does not run
(anymore)
Mains voltage failure
Failure of a phase
Under - or overvoltage
Check mains voltage
Shortcut earth Check the motor connection and mains voltage
Coil closure Replace fan
Thermal motor protection has trig-
gered (motor is overheated)
Check for free air passages; remove foreign bodies if necessary
See “Impeller blocked or dirty”
Check supply air temperature
Check voltage
Impeller blocked or dirty - Disconnect the motor from the power supply and secure it against
switching back on
- Check safe isolation from supply
- Remove protective grille
- Remove foreign bodies or dirt
- Reinstall protective grille
- proceed as described in the Commissioning chapter
Fan does not start Temperature too low for bearing
grease
Insert bearing with cold greasing
Air stream wrong direction
(Motor turns in wrong direction at
high speed)
Check air stream
(see behaviour in rotation by air current in reverse direction)
see “Fan does not run”
“Fan turns too
slowly”
Impeller / blade drags / scrapes When indicated clear foreign bodies / dirt from the fan
Active temperature management
effective
(Motor or electronics overheated)
Check for free air passages; remove foreign bodies if necessary
See “Impeller blocked or dirty”
Check supply air temperature
Check installation space (air speed over heat sink)
air flow too low “Fan turns too slowly” see "Fan turns too slowly"
Airways blocked Check for free air passages (supply/exhaust air flaps, filters)
See “Impeller blocked or dirty”
Pressure loss different to projec-
tion
Check fan selection
Vibrations Imbalance Check blades for damage, soiling or ice (see "Impeller blocked or
dirty")
No or wrong vibration dampers
(only in radial)
Install correct vibration dampers
unusual noises Bearing damaged / worn Change bearings
In motor size 055“(Z” / “B” at cross flow) and 072 (O) change the fan.
Impeller / blade drags / scrapes When indicated clear foreign bodies / dirt from the fan (see "Impeller
blocked or dirty")
Operation beyond tear-off point
(for axial fans)
Check for free air passages (supply/exhaust air flaps, filters)
Wrong overlap on nozzle
(for centrifugal fans)
Observe the installation instructions
Assembly instructions ECblue Diagnostics / Faults
L-BAL-F055D-GB 2021/51 Index 006 Part.-No.
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ZIEHL-ABEGG ECblue Specifications

General

Brand	ZIEHL-ABEGG
Model	ECblue
Category	Fan
Language	English