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Section 6 – Troubleshooting
WARNING: Refer servicing to qualified service personnel. When power is on, dangerous
voltages exist within chassis components. Use extreme care when measuring voltages on live
circuits.
6.1 Unit Will Not Operate (no cooling or pumping)
• Check that the power cord is plugged in to an operating electrical outlet.
• Check that the Circuit Breaker/Power Switch is ON.
• Check that the front panel Power Switch is ON.
6.2 No Pumping
• Check the fluid level in the whole system to make sure the pump is receiving fluid.
• Check if the pump motor is operating.
• Check for blockage within the circulating system.
6.3 Insufficient Pumping
• Check for low line voltage.
• Check for too small of a hose diameter.
• Check for too high of a fluid viscosity.
• Check for restrictions in the connecting tubing.
6.4 No Cooling or Insufficient Cooling
• Check for low or high line voltage.
• Check for blocked airflow through ventilation screens.
• Check ambient air temperature. High air temperature may cause the refrigeration compressor to
temporarily shut down.
• Check for excessive heat being transferred to the cooling fluid liquid as this may exceed the
cooling capacity of the refrigeration system.
6.5 Triac Failure
• Triac fault message appears on the display, indicating that the triac has failed or the line supply
voltage has a source of extreme interference from other equipment. Plug the unit into another
power source. If it still displays triac failure, a triac or triac driver needs replacement.
6.6 Internal Probe Failure
• The Internal Probe failure message appears on the display, indicating that the internal probe has
failed or there is a problem with the circuitry reading the probe signal. Contact supplier.
6.7 External Temperature Probe Failure
• The External Temperature Probe failure message appears on the display, indicating that a
problem with the probe has been detected.
• Check the integrity of the external temperature probe connection to make certain that the probe
has not been unplugged.
• Replace the external temperature probe.
• If the problem persists, operate Chiller using internal temperature probe and contact supplier.
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