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Troubleshooting (continued)
With the squirrelcage blower operating, the air plenum should compress, completing the circuit
to the igniter. The elapsed time meter should start to indicate elapsed time. If this meter does not
operate, check for continuity at the SYSTEM switch. Check continuity of the air pressure switch; should
read 0 Ohms between "NO" and "COM" when actuated. A defective elapsed time meter will not
prevent bulb ignition.
With the SYSTEM switch in the "ON" position, a distinct high voltage arc ping at the igniter spark
gap should be heard, and a flash from the xenon bulb should be visible, as DC voltage is applied to
the bulb electrodes. If the high voltage ping or the flash at the ammeter is not apparent, check for
110 V.DC "No Load" voltage between the lamphouse and power supply. An adequate level of "no
load" voltage will close the relay on the igniter PC board and fire the igniter. Momentarily pressing the
STRIKE switch will bypass the igniter PC board.
If the correct voltage for the power supply is not measured, the problem is in the lamphouse/
power supply interconnecting cable(s), or in the power supply. See the preceding troubleshooting
guide for additional instructions and tests.
If the high voltage arc is audible at the lamphouse, and the bulb does not flash, replace the
bulb and attempt ignition with the new bulb.
Using the new bulb, if the high voltage arc is audible at the lamphouse, the flash of the bulb is
visible, and ignition is not sustained, the problem is in the power supply.
If the high voltage arc is not audible or the flash of the bulb visible, the trouble is in the igniter or
the igniter printed circuit board assembly.
Bulb fails to ignite.
1. AC power not on to lamphouse. If 230 V.AC not read at 3 & 4, check power supply.
2. Air pressure switch S4 not closing. Check for unobstructed hose; clean if required. Check continu-
ity between "NO" and "COM"; replace if defective.
3. Faulty S1 "SYSTEM" switch. Check for voltage at 5 & 6; check for loose wiring. Replace if defective.
Bulb fails to ignite; ping audible, bulb flash visible.
1. Inadequate DC output from xenon power supply. Set power supply output to correct range
required for bulb wattage.
2. Faulty or expired xenon bulb. Replace as required.
Bulb fails to ignite; ping audible, no bulb flash.
1. Faulty xenon bulb. Check for cracked electrodes or darkened envelope. Replace if defective.
2. Ignition pulse shorting to ground. Inspect DC leads for burned insulation; dress leads away from
grounded metal components.
No high voltage ping audible; MODE switch in "MAN." and LAMP switch in "ON."
1. Loss of AC control voltage. Check xenon power supply for open thermal switch.
2. Little or no DC "No Load" voltage. Measure DC "No Load" voltage at rectifier output terminals.
3. Defective igniter PC board. Press STRIKE switch to bypass; do not hold switch for longer than one
second. Repair or replace PC board.
4. Defective "STRIKE" switch. Check for continuity across terminals.
5. Faulty igniter. Check for 230 V.AC at 3 & 4; adequate DC "No Load" measured. Replace igniter if
defective.
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