Diagnostic Mode; Section 7 - Service And Technical Support - PolyScience Refrigerated Recirculating Chillers Operator's Manual

6.8

Diagnostic Mode

NOTE: The Chiller must be set up to display temperature in ° C in order to access the diagnostic
mode.
The Chiller incorporates a Diagnostic mode, which displays important operational information that
can aid in troubleshooting. To access the Diagnostic mode, place the Circuit Breaker/Power Switch
in the "Off" position and then return it to the "On" position while pressing and holding the Select/Set
Knob. The diagnostic menu appears on the Pressure/Flow Rate display; the current value for the
diagnostic item appears on the temperature readout. Pressing the Units/Menu Button toggles
through the various Diagnostic menu items
NOTE: Diagnostic items are display values only; they cannot be changed.
Menu Item
EC
Ut
Li
Ct
Fb
EP
03 (variable numeric value)
At

Section 7 - Service and Technical Support

If you have followed the troubleshooting steps outlined in Section 6 and your Chiller still fails to
operate properly, contact the supplier from whom the unit was purchased. Have the following
information available for the customer service person:
— Model, Serial Number, and Voltage (from back panel label)
— Date of purchase and purchase order number
— Supplier's order number or invoice number
— A summary of the problem
Description
External voltage control
Upper (head) temperature
Percentage of Line voltage
Chiller type
Fuse bits (remote control voltage, contact closures, etc.)
External probe temperature and "---." displayed when external
probe is not installed
Fluid flow rate or pressure.
Temperature display shows current fluid temperature.
Ambient temperature at front panel
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