User Manual
2253i / 2253iX
AMETEK
California Instruments
100
7. Service
7.1 Cleaning
The exterior of the power source may be cleaned with a cloth dampened with a mild detergent and
wrung out. Disconnect mains power to the source before cleaning. Do not spray water or other
cleaning agents directly on the power source.
7.2 General
This section describes the suggested maintenance and troubleshooting procedures. The
troubleshooting procedure is divided into two sections. The first section deals with basic operation and
connection of the equipment. The second section requires opening the unit and using LED indicators
and a simple multimeter to troubleshoot the unit down to the module level. Only a qualified electronic
technician should attempt this level of troubleshooting.
7.3 Basic operation
PARAGRAPH
PROBLEM
7.3.1
Excessive Output Voltage
7.3.2
Poor Output Voltage Regulation
7.3.3
Overcurrent Light On
7.3.4
Distorted Output
7.3.5
No Output and no lights on front panel
7.3.6
No output, but front panel controller is active.
7.3.1 Excessive Output Voltage
CAUSE
SOLUTION
External sense not connected(If used)
Connect external sense wires on the rear
panel from TB1 to TB2. DO NOT MIX UP
PHASE ORDER.
External sense reversed (If used)
Verify the output A connects to sense A
input, B to B, C to C and N to N.
7.3.2 Poor Output Voltage Regulation
CAUSE
SOLUTION
Unit is overloaded
Remove overload
Unit is programmed to wrong voltage
range.
Select correct voltage range.
Input line has fallen below spec. limit.
Check input supply voltage.
Internal sense mode.
Connect external sense wires to load and
select external sense mode.
