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72 F300S/F300SQ Ultraviolet Lamp System
Switch from
OFF to
STANDBY or
from STANDBY
to ON
PS TEMP
indicator lights
Power supply fan
inoperative
Repair or replace fan.
Power supply too
hot or in poor
location
Move to cooler location.
Temperature switch
faulty or not
connected.
With power off, check the T101 and T102
thermal switches, which should be closed,
with an ohmmeter or DVM. Check that the
thermal switch interconnections are
secure.
Card connectors not
secure
Reseat connectors.
Control card Replace control card.
SYS BLWR
indicator lights
Blower power;
pressure
If SYS BLWR input for external blower in
J105A is in use, check external blower
power and pressure in the same manner
as remote blower.
Jumper in J105A If SYS BLWR input not in use, check
jumper is in place in connector J105A.
Control card Replace control card.
Lamp Control at
STANDBY
PWR ERROR
indicator lights
K101 Check for presence of magnetron current.
If within specifications, then examine
relays for stuck armature or contacts
welded shut. Check operation of relay with
single-phase power only connected.
Control card Replace control card.
CAUTION: Disconnect single-phase power at main circuit breaker immediately.
Magnetron may be severely damaged by application of high voltage when lamp
control is in OFF or STANDBY.
Table 18. Troubleshooting/Fault Diagnosis (continued)
Operation
Signal/
Other
Symptoms
Possible Cause Corrective Action