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User Manual
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
cleaning agents dir
7.2 Ge
neral
This section describes the suggested ma
t
roubleshooting procedure is divided into tw
and connection of the equipment. The second
indicators and a simple multimeter to troubl
electronic technician should attempt this level of troubleshooting.
7.3 Ba
sic oper
ation
PARAGRAPH
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.1 Excessiv
e O
utput Voltage
CAUSE
External sense not connected(If used)
External sense reversed (If used)
7.3.2 Poor Output Voltage Regulation
CAUSE
Unit is overloaded
Unit is programmed to wrong voltage
range.
Input line has fallen below spec. limit.
Internal sense mode.
California Instruments
ectly on the power source.
intenance and troubleshooting procedures. The
PROBLEM
Excessive Output Voltage
Poor Output Voltage Regulation
Overcurrent Light On
Distorted Output
No Output and no lights on front panel
No output, but front panel controller is active.
before cleaning. Do not spray water or other
o s
ections. The first section deals with basi
sectio
n requires opening the unit and using LED
eshoot the unit down to the module level. Only a qualified
SOLUTION
Connect external sense wires on the rear
panel from TB1 to TB2. DO
PHASE ORDER.
Verify the output A connects to sense A
input, B to B, C to C and N to N.
SOLUTION
Remove overload
Select correct voltage range.
Check input supply voltage.
Connect external sense wires to load and
select external sense mode.
2253i / 2253iX
c operation
NOT MIX UP
99
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