TDK-Lambda 203, Operator'S Manual, Page: 30 / 60

CONTROLS, INDICATORS, CONNECTORS
83489011 Rev A
5-6
through the output diode rectifiers. While the EXCESS REVERSAL sense circuit does
not directly protect the diodes, it will stop the power supply from continuing to run in the
case where reversal may be building up and could cause damage if left unchecked.
This protection circuit will reset automatically after three (3) seconds and restart the
power supply. Repeated operation of this circuit indicates the presence of a persistent
problem that must be corrected by some form of protection, clipper circuit or series re-
sistor. Refer to Application Note 517 (available from the factory or at www.us.tdk-
lambda.com/hp) for more information.
5.10.2.5 INTERNAL ARC (Normally OFF)
When illuminated, the INTERNAL ARC indicator signals a major fault internal to the high
voltage tank of the power supply. This type of fault may be reset if the POWER is cy-
cled; however, if it recurs, the unit should not be used any further because the output
may be uncontrolled if present and could cause further damage to the supply or its load.
The power supply should then be serviced by qualified personnel.
5.10.2.6 CLAMP (Normally OFF)
The CLAMP indicator illuminates when an overvoltage condition is detected on the out-
put. The CLAMP indicator will also illuminate if the unit is being programmed to a higher
voltage than it is rated for. The power supply will turn OFF the high voltage output (inhib-
ited) and may be reset by depressing the HV OFF push-button on the front panel when
the overvoltage condition is no longer present.
5.10.3 COOLANT LED GROUP
In the event of any coolant faults the user should verify installation orientation is in ac-
cordance with Section 4.4 prior to contacting TDK-Lambda Americas.
5.10.3.1 FULL (Normally ON)
When illuminated, this indicator signals that the high voltage tank in filled to the correct
level with coolant. This indicator may be extinguished if the unit is cold.
5.10.3.2 WARNING (Normally OFF)
This indicator will FLASH if the coolant drops below its safe operation level, indicating
that the coolant may be leaking (there are no environmental or safety hazards from this
coolant leaking. It will evaporate before it collects). The unit should be serviced if the
coolant is low.
5.10.4 FAULT (Normally OFF)
The FAULT indicator when illuminated indicates the coolant level is below the allowable
level to safely operate the power supply. The FAULT indicator will turn OFF the high
voltage output and it cannot be reset until the coolant level is corrected. The unit must
be serviced by authorized service personnel.
5.10.4.1 OVERTEMP (Normally OFF)
The OVERTEMP LED illuminates if the HV tank temperature is outside of its operating
limits. The fixed operating limits have minimum low temperature and a maximum high
temperature. When illuminated, the OVERTEMP indicator will turn OFF the high voltage
output. When the internal temperature returns to a normal level, the output may be
switched back on by depressing the HV ON push-button.