Reliance electric MinPak Plus, Инструкция по эксплуатации

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TABLE 5.A - TROUBLESHOOTING SUGGESTIONS FOR THE
THREE PHASE MINPAK CONTROLLER (Continued)
Symptom Probable Cause Recommended Procedures
8. Drive motor does
not run, but M
contactor and CR
Pull up.
(Use this proceĆ
dure only if conĆ
troller has optionĆ
al Test Meter
Adapter Kit. )
No input signal from
SPEED pot.
First check the main power supplies. This must be done with power applied to the
MinPak Plus controller,
Connect one lead of voltĆohmmeter to test pin 357 on the Test Meter Adapter Module.
Connect the second lead to test pin 356 on the Module.
The reading should be within the range of 10.8 to 11.5 VDC for normal operation.
Next, remove the lead from pin 356. Place it on pin 456.
The reading should be within the range of +16 to +28 VDC for normal operation.
Nt th l d f i 456 Pl it i 471
The reading should be within the range of +16 to +28 VDC for normal operation.
Next, remove the lead from pin 456. Place it on pin 471.
The reading should be within the range of Ć16 to Ć28 VDC for normal operation.
If the proper readings are obtained, the power supplies may be assumed to be
operating correctly,
If incorrect reading are obtained, replace the Regulator Module.
Next, check the reference voltage input signal. (This changes in direct proportion to
an increase of SPEED potentiometer voltage caused by a turning of the dial.)
Connect one lead of a voltĆohmmeter to pin 357 on the Test Meter Adapter Module.
Connect the other lead to pin 826. Readings vary from 0 to +8.2 VDC, depending on
the set point of the SPEED potentiometer dial.
If no voltage is noted between pins 357 and 826, check to see if jumper J4 on the
Regulator Module is properly placed/removed for the specific controller. (It is to be in
place, as factoryĆshipped, if there is no AUTO/MANUAL switch. It is to be removed if
there is an AUTO/MANUAL switch.)
If the SPEED potentiometer is functioning normally, and if the J4 jumper is
placed/removed, as necessary, replace the Regulator Module.
9. Drive motor does
not run with M
contactor picked
up. Potentiometer
properly operatĆ
ing.
No output from Power
Cubes, 45Ć47.
Examine armature wiring. First, open the power disconnect switch.
Check armature wiring for loose connections.
Turn aĆc power on again.
Connect a voltĆohmmeter to terminals 47 and 45 on TB.
Place the START/STOP switch in the START position.
Increase the speed reference by turning the SPEED dial in the direction of 10.
The reading across 47 and 45, it may be 0 to 240 VDC for 230 VAC controllers. It
should be 0 to 500 for 460 VAC controllers,
If no reading is obtained across 47 and 45, it may be necessary to replace the Power
Cubes and/or the Regulator Module, digital driver module. In order to determine
which, read on.
Regulator module
suspected because
no output reading at
45Ć47.
Test the regulator module for output to digital driver module (PREF).
Turn power off! Open main disconnect.
Connect a VOM, careful not to short pins together to terminals 280 (PREF) & 57 (OV)
on the regulator module.
Restore power to controller.
Place the start/stop switch in start position.
Turn the speed pot to full on position.
Voltage on VOM should be +5 volts.
If this reading cannot be obtained replace regulator module.
Digital driver module
suspected because
no output reading at
45Ć47.
Test the digital driver for firing pulses. (Note: Make sure above test on regulator
module has been completed first.)
Turn power off. Open main disconnect.
Loosen regulator/digital drive module assembly (four screws in each corner. So that access
to digital driver module on back side of assembly is possible. (Refer to Figure 5,7.)
Connect scope common to Pin 57 on regulator module.
Connect scope probe to resistor on primary side of pulse transformer located at 7A or
Digital Driver Board (Refer to Figure 5.4.)
Restore power to controller.
Place the start/stop switch in start position.
Turn SPEED POT to full on position.
A firing pulse waveform (+11.2V) should be seen at this point. If pulse is measured
continue this test from beginning but connect scope across the following resistors to
look at other five firing pulses. (14A,10A,11A,13A, 8A).
If these readings cannot be obtained, replace digital drive module.
DANGER
THE PROCEDURE DESCRIBED HERE IS PERFORMED WITH LIVE AĆC
VOLTAGE APPLIED TO THE CONTROLLER. USE ONLY ONE HAND TO APPLY
VOM LEADS/PROBES. KEEP YOUR OTHER HAND BEHIND YOU AT ALL
TIMES. DO NOT HOLD ONTO THE CONTROLLER FOR SUPPORT. PERĆ
SONAL INJURY MAY RESULT IF THESE PRECAUTIONS ARE NOT TAKEN.
DANGER
THE PROCEDURE DESCRIBED HERE IS PERFORMED WITH LIVE AĆC
VOLTAGE APPLIED TO THE CONTROLLER. USE ONLY ONE HAND TO APPLY
VOM LEADS/PROBES. KEEP YOUR OTHER HAND BEHIND YOU AT ALL
TIMES. DO NOT HOLD ONTO THE CONTROLLER FOR SUPPORT. PERĆ
SONAL INJURY MAY RESULT IF THESE PRECAUTIONS ARE NOT TAKEN.