Conair Thermolator TW-S User Manual page 88

Un i t Faul ts
The Thermolator has detected a problem with the internal components, wiring, electrical power, or operat-
ing environment. Without correction, the fault could lead to equipment damage or personal injury if it is
not corrected.
• The controller displays an error code indicating the cause of the problem.
• The TCU may take automatic control actions, based on the nature of the fault, to best protect the op-
erator and the TCU until the fault is corrected.
• If the optional alarm package is installed, the fault strobe will illuminate and the audible alarm will
activate.
• Some faults require a power cycle to reset.
Fault
br
ht
Controller Board Overheated
The temperature of the controller
board has exceeded the maximum
permissible operating tem-
perature. This is probably due to
excessive temperature inside the
electrical control enclosure.
WARNING: : Only qualified electri-
cal service personnel should
examine and correct problems
that require opening the unit's
electrical enclosure or checking
electrical current.
u ALARM LED illuminated.
u Optional strobe, sounder,
dry contacts actuated.
u Pump operates normally.
u Heater operates normally.
u Cooling valve operates
normally.
This fault can be reset by
pushing the Alarm Silence/Re-
set button once the controller
board temperature returns to
an acceptable level.
6-16 I Tr o u b l e sh o o ti n g
(Continued)
Possible Cause
Have the cooling vents on the
TCU been blocked?
Is the TCU operating in an ambi-
ent environment outside its maxi-
mum permissible limits (max of
104°F {40°C}?
Has the enclosure cooling fan
failed or is the air pathway
blocked?
Solution
Check for blocked or plugged
cooling vents.
Relocate the TCU or provide
additional external ventilation or
cooling.
Replace the fan or clear the
blocked air pathway.
(Continued)