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Q-SERIES DI HEATER OPERATION / MAINTENANCE MANUAL
9
TROUBLESHOOTING
Display is Not Illuminated
Cause:
Solution:
No power at main circuit breaker
Review wiring procedure (see Section 3, Installation).
Control breaker is blown
Check breaker.
Main breaker is OFF
Turn Main breaker to ON.
Alarm Sounds
Cause:
Solution:
DI supply pressure low
Check water supply pressure at source.
Liquid level low
Check water supply at source.
Check overpressure relief diaphragm for rupture.
Check fluid lines in and out of manifold for flow.
Liquid leak
Check manifold and heater modules for leak. Visually
inspect leak tray.
Thermocouple damaged
Check thermocouple leads at temperature limit controller
for continuity.
Over-temperature alarm
Check if heater element has failed and replace module
(see section 8.1).
Check thermocouple leads at temperature limit controller
for continuity.
Verify fan operation.
Unable to maintain set point
Cause:
Solution:
Failed heater element
Circuit breaker tripped
Check if heater element has failed and replace module
(see Section 8.1).
Check and reset the main, auxiliary and element isolation
circuit breakers.
Consult Trebor if circuit breaker repeatedly trips.
Solid State Relay (SSR) may have
“frozen” open
An SSR has failed in the open mode: Shut system off
immediately and replace the failed SSR. SSR’s should be
replaced in pairs.
