OPERATION AND MAINTENANCE MANUAL
MAC-HS MOTORS
PAGE: 60
CODE: CTT32 EDITION: 04 RELEASE: SEPTEMBER 2020
Subject to technical changes without prior notice
6.5
Operating faults
If faults appear during the operation of the motor, first of all check the possibility of the errors given in the following tables. If the
fault cannot be eliminated with any of the following measures, please contact the technical service at VASCAT.
VOLTAGE
All the work must be carried out with no voltage connected.
HOT SURFACE
Hot motor surfaces. Therefore, cooling times must be observed.
6.5.1
Electrical faults
Fault
Probable cause
Corrective action
Motor doesn't start
Excessive load
Reduce load
Power connection problems
Check the frequency converter, power cables and
phase sequence.
Problems with encoder connections
Check encoder cables and converter alarms
Converter disabled
Check message on converter
Motor starts up
with difficulty
Excessive load
Reduce load
Power connection problems
Check the frequency converter, power cables and
phase sequence.
Short-circuit between turns or phase
short-circuit on stator winding.
Check the elements of each winding phase
(milliohmmeter) and the insulation elements (between
phases and between phases and earth using a
megaohmmeter at 250 V). Repair the winding after
consulting VASCAT.
Incorrect motor
rotation direction.
Change of motor power cable polarity
Swap two motor connection phases
Buzzing noise on
start-up
Interruption of a phase in the power
cable after connection
Check the frequency converter and power cables
Short-circuit between turns or phase
short-circuit on stator winding.
Check the elements of each winding phase
(milliohmmeter) and the insulation elements (between
phases and between phases and earth using a
megaohmmeter at 250 V). Repair the winding after
consulting VASCAT.
Buzzing noise
during operation
Overload
Reduce load
Interruption of a phase in the power
cable after connection
Check the frequency converter and power cables
Short-circuit between turns or phase
short-circuit on stator winding.
Check the elements of each winding phase
(milliohmmeter) and the insulation elements (between
phases and between phases and earth using a
megaohmmeter at 250 V). Repair the winding after
consulting VASCAT.
Table 29: Electrical faults (1)
Summary of Contents for MAC-HS 100
Page 1: ...OPERATION AND MAINTENANCE MANUAL MAC HS MOTORS...
Page 64: ...P CTT 32 ED 04...
