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Section 5 – Diagnostics
Figure 5.1 Diagnostic Indicators
Diagnostic Functions
All diagnostic functions will shut down the system and
require the operator to remedy the problem before it
can be restarted.
Low Water Pressure Indicators
The pump, heater, and cooling will not operate while
the pressure is low. The Low Water Pressure Indica-
tor will illuminate when the system pressure is below
20 psi. This warning system is designed to reduce the
possibility of pump cavitation and boiling on the heater
element at higher operating temperatures. Disabled on
CMX-180 models.
Pump Overload Indicator
The Pump Overload Indicator will illuminate when the
pump draws too much current. Low line voltage, single
phase power input, and a seized pump motor are all
possible causes for pump overload.
HAZARD OF ELECTRIC SHOCK. Disconnect
system power, if the Pump Overload Indicator
is illuminated. Hazard of electric shock or elec-
trocution. Disconnect all power and piping to
the system.
After the system power is disconnected, solve the
electrical current problem. To put the pump back on-
line, open the front electrical enclosure and press the
pump reset switch (See Figure 5.2, Overload Switch).
Figure 5.2 Pump Reset Switch
Close the front electrical enclosure door and
retighten the locking screw. This must be done
to limit access to high voltage components.
Failure to comply could lead to electric shock
or electrocution.
Over Temperature Indicator
If the system temperature exceeds 260°F (127°C), the
Over Temperature Indicator will illuminate. When the
system temperature drops below 260°F*, press
RE-
SET
on the controller face. The controller will not reset
until the temperature is below 260°F*.
*
190°F on CMX-180 model(s)
Thermal Devices, Inc. Mount Airy, Maryland USA www.thermaldevices.com
Thermal Devices, Inc. Mount Airy, Maryland USA www.thermaldevices.com