Diagnostic; Trouble Shooting - Siemens SIMOTICS M-1PH818 Instrucciones De Servicio

Assembly instructions ECblue

7 Diagnostic

7.1

Trouble shooting

Type of error Possible cause
Fan does not run No line voltage
(anymore)
line failure
Under - or overvoltage
Earth fault
Short circuit winding
Thermal motor protection has trig-
gered (motor is overheated)
Impeller blocked or dirty
Fan will not start Temperature too low for bearing
grease
Air stream wrong direction
(Motor turns in wrong direction at
high speed)
"Fan does not run"
Fan turns too slowly Impeller / blade scrapes / brushes When indicated, clear foreign bodies/dirt from the fan
Air flow to low Fan turns too slowly
Airways blocked
Pressure loss different to planned Check fan selection
Vibrations Imbalance
No or wrong vibration dampers
(only in radial)
Unusual noises Bearing damaged / worn
Impeller / blade scrapes / brushes When indicated clear foreign bodies / dirt from the fan
Operation beyond stall point
(for axial fans)
Wrong overlap on nozzle
(for centrifugal fans)
L-BAL-F065-GB 1617 Index 004
Adjustment
Check line voltage
Check motor connection and line voltage
Replace fan
Check for free air passages; remove foreign bodies if necessary
"Impeller blocked or dirty"
Check temperature of supply air
Check voltage
- 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"
Insert bearing with cold greasing
Check air stream
"Fan turns too slowly"
Check for free air passages (supply/exhaust air vents, filters)
"Impeller blocked or dirty"
Check blades for damage, soiling or ice
Install correct vibration dampers
Change bearings
(for motor size "Z" replace fan)
blocked or dirty"
Check for free air passages (supply/exhaust air vents, filters)
Observe the installation instructions
Part.-No. 00702801-GB
21/28
Diagnostic
"Impeller blocked or dirty"
"Impeller
187