bonitron M3575R, Руководство для пользователей

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User’s Manual
21
5.
M
AINTENANCE AND
T
ROUBLESHOOTING
Repairs or modifications to this equipment are to be performed by certified personnel only.
Any repair or modification to this equipment by personnel not approved by Bonitron will
void any warranty remaining on this unit.
5.1.
P
ERIODIC
T
ESTING
Monthly, look at surrounding surfaces for any discoloration or scorching. This would
be an indication of overheating. If surrounding surfaces are discolored or scorched,
increase the mounting clearances.
Ensure that debris and dust are not building up on the resistor module. The possibility
of fire exists if flammable material is in contact with the resistor elements.
Ensure that the fan is operational, and free of dust and debris that might reduce the
fan speed or airflow through the unit.
5.2.
M
AINTENANCE
I
TEMS
Check the fan periodically for debris, and blow out with an air hose if it has become
fouled or is not running at full capacity.
5.3.
T
ROUBLESHOOTING
If a problem occurs on start-up or during normal operation, refer to the indications
detailed below. If a problem persists after following the steps below, or if the problem
is not listed, please contact the equipment supplier or system integrator for assistance.
5.3.1.
D
RIVE TRIPS ON OVER
-
VOLTAGE OR SELF
-
LIMITS ITS DECEL RATE
Ensure that the resistor module is properly connected to the AC drive's
braking control circuitry. This can be a chopper module internal to the drive
or an external braking kit. Refer to the AC Drive and/or Braking Kit manuals
as well as Section 3.4 of this manual for field interconnection details.
Verify the ohmic value of the resistor. The specific ohmic value for each unit
can be found in Section 6.1 of this manual. Please note that the values listed
have a tolerance of

10%. If the ohmic value readings are out of tolerance,
return the module for repair or replacement.
If the resistor module is properly connected and the ohmic value is within
tolerance, ensure that the resistor is adequately sized for the application.
Most AC drives are capable of a 150-200% output surge when braking. If the
resistor is insufficient to absorb and dissipate the braking energy, an over-
voltage fault may occur in the AC drive.
5.3.2.
T
HE COOLING FAN DOESN
'
T TURN ON
The cooling fan option is designed to switch on as needed during normal
operation. This usually occurs if the resistor module temperature exceeds
approximately 45

C. If normal switching does not occur, please follow the
steps below to troubleshoot.
1. Does the temperature of the resistor module exceed 45

C?

If not, then cooling is not required and the fan will not switch on.

If so, proceed to step 2.