Temptek G-500 Series, Instruction Manual

Page: 27 / 64

Temperature Control Unit : VTO Series with G500 Series Instrument
Page: 27
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: service@Temptek.com
3.6 INSTRUMENT : FAULT SCREENS
A. Faults Preventing Start Up or Operation :
1. System Safety. This fault screen appears if the following occurs:
a. Water Pressure. The unit will not operate without adequate water supply
pressure. Sufficient water supply pressure must be present to close
the water pressure switch. Recommended water supply pressure is 20
PSI. Water supply pressure should not exceed 55 PSI. If water supply
pressure exceeds 55 PSI, a pressure reducing valve must be installed in
the water supply line.
b. Motor Overload. The unit will not start or run if the motor overload
is tripped. During operations, this error is triggered by excessive flow
causing the pump to draw more amps then it is rated for. A throttling
valve should be placed in the from process line to control flow.
2. High Temp. If process temperature exceed 515°F, the high temperature limit
switch opens and the unit shuts down. High temperature conditions are generally
caused by inadequate water supply pressure, a defective cooling valve, an
obstructed drain line or high back pressure in the drain. Determine the cause and
correct. See the troubleshooting section of this manual for more information. The
high temperature limit switch will automatically reset as the unit cools.
B. Faults Not Preventing Start Up or Operation :
1. To Process Sensor. This fault screen will appear if the To Process temperature
sensor is defective and needs to be replaced or if the sensor connection is wet
or loose.