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7
Diagnostic
7.1
Trouble shooting
Type of error
Possible cause
Adjustment
Fan does not run
(anymore)
No line voltage
line failure
Under - or overvoltage
Check line voltage
Earth fault
Check motor connection and line voltage
Short circuit winding
Replace fan
Thermal motor protection has trig-
gered (motor is overheated)
Check for free air passages; remove foreign bodies if necessary
"Impeller blocked or dirty"
Check temperature of supply air
Check voltage
Impeller blocked or dirty
- Switch off power to the motor and secure against switching back on
- Check safe isolation from supply
- Remove safety grille
- Remove foreign bodies or soiling
- Remount the safety grille
- Further procedure as in the chapter
“
Start-up
”
Fan will 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
"Fan does not run"
Fan turns too slowly Impeller / blade scrapes / brushes When indicated, clear foreign bodies/dirt from the fan
Air
fl
ow to low
Fan turns too slowly
"Fan turns too slowly"
Airways blocked
Check for free air passages (supply/exhaust air vents,
fi
lters)
"Impeller blocked or dirty"
Pressure loss different to planned Check fan selection
Vibrations
Imbalance
Check blades for damage, soiling or ice
"Impeller blocked or dirty"
No or wrong vibration dampers
(only in radial)
Install correct vibration dampers
Unusual noises
Bearing damaged / worn
Change bearings
(for motor size
“
Z
”
replace fan)
Impeller / blade scrapes / brushes When indicated clear foreign bodies / dirt from the fan
"Impeller
blocked or dirty"
Operation beyond stall point
(for axial fans)
Check for free air passages (supply/exhaust air vents,
fi
lters)
Wrong overlap on nozzle
(for centrifugal fans)
Observe the installation instructions
Assembly instructions
ECblue
Diagnostic
L-BAL-F065-GB 1617 Index 004
Part.-No. 00702801-GB
21/28
185
Summary of Contents for 1PH818
Page 2: ...18 07 2016 14 04 V14 00 ...
Page 12: ...Introduction SIMOTICS M 1PH8 1PH818 1PH822 12 Operating Instructions 07 2016 ...
Page 28: ...Description SIMOTICS M 1PH8 1PH818 1PH822 28 Operating Instructions 07 2016 ...
Page 100: ...Operation 8 10 Faults SIMOTICS M 1PH8 1PH818 1PH822 100 Operating Instructions 07 2016 ...
Page 136: ...Quality documents SIMOTICS M 1PH8 1PH818 1PH822 136 Operating Instructions 07 2016 ...
Page 197: ...AA Manual STROMAG Break AC Manual Ziehl Abegg external fan ...