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In the event that the USX Edge chiller should stop due to fault conditions, contact your local representative
for details. Under no circumstance should you try and rectify the fault yourself. All faults should be rectified
by a trained professional. The model name, error code and serial number will be required to investigate the
fault.
The troubleshooting table below is an advisory and should not be taken as an error code.
Symptom
Pump/compressor
does not start
Pump is operating but compressor does not start
Pump is operating but water is not circulating
Water is accumulating on the surface of the
water pump.
Water drains from the bottom of the chiller base,
causing the surface around the chiller to get wet.
Enclosures or the surface around the chillers are
getting wet.
Water is draining from the coil drain pan
pipework during cooling operation.
Main troubleshooting examples are described from the next page.
(Note 1) in the tables applies to the model having a built-in inverter pump only.
(Note 2) in the tables applies to the heat pump module only.
(Note 3) in the tables applies to the powerful heating type only.
Repairs require specialized technical expertise. Do not repair the equipment by
yourself but contact your dealer or local Toshiba Carrier representative.
Troubleshooting
Operation indicator
does not light up
Operation indicator
lights up
Is there a power interruption?
Is the external power switch turned OFF?
Is the operating mode (Unit/External/Remote) correct?
Are any of the power box circuit breakers turned off?
Is the module Unit/Remote switch set to Unit?
Is the leaving water temperature close to the set
temperature?
Has the compressor stopped for less than 2 minutes?
Is operation pattern (temperature setpoint, etc.) set correctly?
Is operation mode (cooling/heating) correct?
Are the valves inside the water piping system open?
Is the air accumulated inside the water piping system?
Is the water shared with other heat pump?
Is the pressure of suction pipe negative? (Too much
resistance for suction pipe)
Are there any water leaks visible when carrying out the visible
inspection?
Is there condensation occurring inside the chiller?
Ensure water is drained as required.
Is the sprinkler operating or has the sprinkler operated? (The
water sprayed will cover the surface of the air heat
exchanger).
Is the sprinkler operating or has the sprinkler operated? (The
water sprayed might not have evaporated therefore will be
drained via the drain pan pipework).
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