Advantage Sentra SK Series, Instruction Manual, Page: 27 / 70

Temperature Control Units : Sentra with VE Series Instrument
Page: 27
Advantage Engineering, Inc.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
www.AdvantageEngineering.com
Note: The standard temperature range for VE Series mold temperature control
units is approximately 32°F above the cooling water supply temperature
to 250°F.
A. INSTRUMENT START-UP
1. When the correct electrical power and adequate water supply pressure are
supplied to the unit, it is possible to start the unit for temperature control duty.
2. When the power is engaged to the unit, the instrument will momentarily illuminate
all indicating lights and digits on the display. After a short delay, the controller
software version number is displayed. At this time, the operator can verify that all
lights and digits are functioning properly. If the operator determines an indicating
light or digit does not illuminate, the controller must be removed and sent to the
factory for repair.
3. Also, the instrument will immediately check the status of the sensor probe,
the high temperature safety switch, and the water supply pressure switch for
acceptable operating conditions. If all systems are found to be ‘ok’, the unit will
begin operations. If a system is not found to be ‘ok’, the instrument will not start
and will illuminate no FLO in the temperature display window.
4. Conditions that will prevent the unit from starting process temperature control
operations are:
a. Water supply pressure inadequate (pressure switch is open). The unit
is prevented from operating without adequate water supply pressure
by an electrical panel mounted pressure switch. Sufficient water supply
pressure must be present to close the switch and consent the safety
circuit.
b. Motor overload switch opened. The electric motor is protected from
excessive flow by a set of thermal overload relays. These relays will
open (trip) and prevent operation. If open, the overload relay must be
reset before operations can continue. An excessive flow condition must
be corrected immediately.
c. High temperature limit switch open. The unit is prevented from
operations with temperatures exceeding 256°F by a “high temperature
limit switch”. This switch is installed in the To Process temperature
sensor. If this switch is open (due to a high temperature condition), the
control circuit is not consented and the unit cannot be started. If a high
temperature condition exists, the unit must first “cool down” (reduce
water temperature) before the “high temperature limit switch” will
automatically reset to allow operation.
d. Temperature sensor. Failure of the To Process temperature sensor will
be indicated in the Temperature window by a “--- ---”. Check the sensor
cable and connector for loose wires or moisture. If no problems are
found, replace the sensor.