Advantage Engineering Maximum Instruction Manual page 40

MK Series Portable Chiller : Air-Cooled : HE INSTRUMENT
4.1 SENSORS
A. The sensor is a solid state temperature transducer which converts
temperature input to proportional current output.
B. To quickly test for a defective probe, switch connections between
the defective probe and a probe known to be working properly.
4.2 PROCESS/EVAPORATOR PUMP
A. The centrifugal pump is designed to operate at a specific flow and
pressure at the maximum run load amp draw of the motor. Too
much flow can overload the motor and cause the overload circuit
to open and stop the pump.
B. If the overload trips, check for electrical shorts, loose wires, or
blown fuses. If these check OK, reset the overload circuit and restart
the chiller.
C. Check the amp draw and if overloaded, partially close the from
process line valve until the amp draw drops to the proper level.
4.3 COMPRESSOR
A. Semi-hermetic compressors are protected by an external overload
device (Klixon switch, solid state module, etc.). If the safety switch
opens, this indicates an overload condition exists.
B. Check for electrical shorts, loose wires, bad fuses, or bad motor
starter contacts. If these check ok, check for a defective protection
device.
C. Hermetic compressors have internal protection.
4.4 LOW FLOW
A. Two pump chillers have a pump dedicated to the evaporator. The
flow safety switch is located in the evaporator circuit and does not
sense process flow.
B. One pump chillers require 100% of the process flow to circulate
through the evaporator.
C. In some process conditions the minimum flow required cannot be
maintained making it necessary to install a bypass line between the
to and from process lines.
4.5 THREE PHASE SUPPLY
A. On HE instruments, this Indicates the three phase power supply has
been connected out of phase with the chiller. Disconnect the power
supply and reverse any two wires.
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
Page: 40