Hobart GPU-600 Series, Operation And Maintenance Manual

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OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
December 15, 2014 Chapter 3-1
Page 2
f) Loosen the cable clamp at the base and remove the output cable from the GPU.
g) If the unit is a bridge mount unit, also disconnect and remove the remote control cables.
h) If the unit is bridge mount or fixed mount, attach a lifting hoist or forklift to the bottom of the GPU and
remove the mounting screws or bolts that attach the GPU to its mounting.
i) Carefully remove the GPU.
j) Move the GPU to a clear working area where it can be placed on a solid supporting structure.
k) Re-install the GPU in the reverse order of removal. See Section 1-2 for additional information on
installing the GPU.
4) Component Removal and Replacement
Most of the components in the GPU are easily replaced when necessary. Chapter 1 and Chapter 4 show
the locations of the components in the GPU.
WARNING
To avoid the danger of electric shock, always make sure that the input power is turned
off at the source and cannot be inadvertently turned back on before working inside the
GPU.
a) Lights
The light bulbs are accessible from the front by unscrewing the lens.
Light Unit Bulb Type
Input Power On
Standard Type 120 MB (120 V, .025 A, T-2-1/2)
Units with CE marking Type 757 (28 V, .08 A)
Output Contactor Closed All Type 757 (28 V, .08 A)
Overload/Overvoltage No bulb
– this is an LED assembly
b) Circuit Board
Chapter 4-3, Figure 2 gives the location and part number of the circuit board. To replace the circuit
board, unplug the connectors and remove the six screws.
c) Fuses
The following table provides the locations and functions of the fuses. If a fuse has blown, check the
related circuitry. Always replace the fuses with similar fuses having the same type and rating.
Fuse Protects Location Rating
F1 Fan Fan shroud 5 A, 250 V, Type ABC
F2
– F7 Circuit Board
Fuse block next to circuit board 1 A, 250 V, Type AGC, Fast blow
F8 Input Contactor Control transformer 0.5 A, 250 V, Type AGC, Fast blow
F9 Receptacle Front Panel 10 A, 250 V, Type ABC
d) Thermostat Switches