Troubleshooting I 6-21
6
Troubleshooting
Unit Faults
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 Possible Cause Solution
Ph
Err
Phase Loss/Rotation Error
The three-phase electrical power
being provided to the TCU is
either missing a leg, or has
incorrect phase rotation direction
(TCU is factory-wired for clock-
wise, L1-L2-L3, phase rotation).
This fault is only present on
TCU’s that have the optional
three-phase monitor included.
WARNING: Only qualified elec-
trical 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 locks off.
u Heater locks off.
u Cooling valve locks closed.
Power must be cycled to reset
this fault.
Do you have a dead/low leg in the
incoming three phase power?
Have a qualified electrician check
your three-phase power, and cor-
rect any problems.
If a portable installation, are
different parts of your factory
phased differently?
Ensure consistent phasing
throughout your facility.
--Or--
Reverse any two incoming power
legs on the TW-P. See Connecting
the Main Power Source.
Check for proper rotation of
pump. See Testing the Installa-
tion.
(Continued)
NOTE: This
feature is
an option
and not
present on
all models.
0
(Continued)
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