Hobart GPU-600 Series User Manual

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
December 15, 2014
Chapter 2-1
Page 9
Trouble, Symptom, Condition
Probable Cause
Test, Check, and/or Remedy
Output Voltage Not Proper Level
1. Poor voltage regulation
a. Loose connection of voltage
sensing lead
Check connection at output
contactor and control circuit board.
Tighten connection as necessary.
2. Output voltage too high (above
32 Volts)
a. Voltage calibration off
Attempt calibration per Section 2-2. If
calibration isn’t possible replace PC
control board.
b. Voltage sensing lead open
Repair or replace voltage-sensing
lead.
3. Unstable voltage
a. Open filter capacitor
Find and replace defective capacitor.
b. One or more SCRs not firing
properly
Adjust balance control or replace
defective SCR heat sink assembly if
oscilloscope shows faulty SCR
devices. Replace PC control boards
if oscilloscope shows no gate pulse
and the PC control board inputs and
controls are proper except for output.
Trouble, Symptom, Condition
Probable Cause
Test, Check, and/or Remedy
Output Contactor Fault
1. Output contactor will not close.
a. Defective output switch (S2)
With the unit turned off, place a
jumper between terminals 2 and 4 on
S2. Turn S1 on. If output contactor
closes, S2 is defective. Replace.
b. Defective input contactor
auxiliary contacts (K1)
With the unit turned off, place a
jumper between terminals NO 1 and
COM 3 on input contactor. Turn S1
on, and place S2 in Close position.
If output contactor closes, K1 is
defective. Replace.
c. Defective output voltage select
switch (S103) (if applicable)
With the unit turned off, place a
jumper between terminals 4 and 5 on
S103. Turn S1 on, and place S2 in
Close position. If Output contactor
closes, S103 is defective. Replace.

Hobart GPU-600 Series Specifications

General

Brand	Hobart
Model	GPU-600 Series
Category	Transformer
Language	English