83-507-5002 Rev. A
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CHAPTER 9 MAINTENANCE
9.1 INTRODUCTION
This Chapter provides information about maintenance, calibration and troubleshooting.
9.2 UNITS UNDER WARRANTY
Units requiring repair during the warranty period should be returned to a Lambda authorized ser-
vice facility. Refer to the addresses listing on the back cover of this User’s Manual. Unauthorized
repairs performed by other than the authorized service facilities may void the warranty.
9.3 PERIODIC MAINTENANCE
No routine maintenance of the power supply is required except for periodic cleaning. To clean,
disconnect the unit from the AC supply and allow 30sec. For discharging internal voltages. The
front panel and the metal surfaces should be cleaned using a mild solution of detergent and
water. The solution should be applied onto a soft cloth, and not directly to the surface of the unit.
Do not use aromatic hydocarbons or chlorinated solvents for cleaning. Use low pressure
compressed air to blow dust from the unit.
9.4 ADJUSTMENTS AND CALIBRATION
No internal adjustment or calibration is required. There is NO REASON to open the power supply
cover.
9.5 PARTS REPLACEMENT AND REPAIRS
As repairs are made only by the manufacturer or by authorized service facilities, no parts re-
placement information is provided in the manual. In case of failure, unusual or erratic operation of
the unit, contact a Lambda sales or service facility nearest you. Please refer to the Lambda sales
offices addresses listing on the back cover of this User’s Manual.
9.6 TROUBLESHOOTING
If the power supply appears to be operating improperly, use the Troubleshooting Guide (Table 9-
1) to determine whether the power supply, load or external control circuit are the cause.
Configure the power supply for basic front panel operation and perform the tests of Section 3.8 to
determine if the problem is with the supply.
Table 9-1 provides the basic checks that can be performed to diagnose problems, with refer-
ences to Sections of this User’s Manual for further information.
Table 9-1: Troubleshooting guide
SYMPTOM CHECK ACTION REF
Is the AC power cord
defective?
Check continuity, replace
if necessary.
3.7
No output. All displays and
indicators are blank.
Is the AC input voltage
within range?
Check AC input voltage.
Connect to appropriate
voltage source.
3.6
3.7
Output is present
momentarily but shuts Off
quickly. The display
indicates “AC”.
Does the AC source
voltage sag when load is
applied?
Check AC input voltage.
Connect to appropriate
voltage source.
3.6
Output is present
momentarily but shuts off
quickly.The display indicates
“OUP”.
Is the power supply
configured to Remote
sense?
Check if the positive or
negative load wire is
loose.
3.9.6
3.9.8
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