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8.4 Power module
If reading of fault codes does not provide a clear answer as to
whether the power module is functioning correctly, you can
proceed as described below.
1. Check that the voltage to the module is within the limit values
stated on the nameplate. Check all phases of a three-phase
motor.
2. If there are signs of moisture in the terminal box, take
necessary precautions to prevent similar faults.
3. Check the two status diodes of the power module
(the functional module must be connected) by looking under
the power module from the side. Status diode D54 must be
permanently on when connected to mains. Status diode D7
(three-phase model) or D19 (single-phase model) flashes
when the functionality is correct. See table below.
Fig. 42 Status diode of power module, single-phase
Fig. 43 Status diodes of power module, three-phase
Warning
The terminals of the power module are live.
Warning
Measuring equipment must be free of static
electricity or have same potential as the motor
before being used for measurement without
isolation cover.
It may be necessary to dim the light as the diode
light is weak.
Status, single-phase Fault
D19 is permanently on.
• The microprocessor is frozen.
• No initialising message from
the functional module.
Switch the power supply off and
on. If this does not solve the
problem, replace the power
module. See section 7.8.
D19 is off.
The power module is defective.
See section 7.8.
D19 is flashing
40-80 times/minute, and
D54 is permanently on.
The power module is functional.
D54 is off.
The power module is defective.
See section 7.8.
D19 and D54 are flashing
40-80 times/minute.
Short-circuit in the connection to
the functional module or in the
functional module.
TM05 7126 0613
LED D54 5VLED D19 Micro Controller
Status, three-phase Fault
D7 is permanently on.
• The microprocessor is frozen.
• No initialising message from
the functional module.
Switch the power supply off and
on. If this does not solve the
problem, replace the power
module. See section 7.8.
D7 is off.
The power module is defective.
See section 7.8.
D7 is flashing
40-80 times/minute.
The processor of the power
module is functional.
D54 is permanently on.
The processor of the power
module is functional.
D54 is off.
The power module is defective.
See section 7.8.
TM05 7125 0613
LED D54 5VLED D7 Micro Controller
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