Issues And Resolutions - Aquacal Tropicool TC500 Operation Manual

Determine if an insufficient amount of water is being supplied to the equipment.
1. Confirm the filter pump is on.
2. If a multiple-speed filter pump is being used, run filter pump at a higher speed. Do not exceed maximum flow rate
for the model.
3. Confirm water is not being diverted away from the chiller.
See "Water Flow Rates" on page 13.
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4. The water pressure switch may be incorrectly calibrated. See "Adjusting Water Pressure Switch" for more
information.
LP5 Indicator
ISSUE
The chiller has locked due to five LP (low-pressure) faults during one call for cooling.
RESOLUTION
1. Deactivate then reactivate power to the chiller to clear error.
2. Troubleshoot the low-pressure issue causing the error. See "LP Indicator" on page 21.
OtA Indicator
ISSUE
Incoming water temperature exceeded 110° F and the unit is locked with an OtA over temperature alarm. The
chiller will not operate until incoming water temperature drops to 100° F or lower.
RESOLUTION
1. Determine if another heat source (gas heater, solar heater, etc.) is heating water being sent directly to the chiller
with the OtA indicator. This situation will need to be corrected before continuing.
2. Rule out an incorrect reading from the water temperature sensor. Verify existing water temperature with an
accurate thermometer. If chiller's sensor is inaccurate, the water temperature sensor may require replacement.

4.2 Issues and Resolutions

WARNING
NOTICE
Please perform the following troubleshooting.
For further assistance, please see "Contacting AquaCal AutoPilot, Inc." on page 1.
Display Panel Not Responding
1. If the chiller is controlled be an external controller, confirm the external controller settings. See "Operating
Chiller (With an External Controller)" on page 9.
2. If the issue is still occurring, contact the installer or manufacturer of the external control device.
Failure to heed the following may result in injury or death.
Repairs must not be attempted by untrained or unqualified individuals.
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The chiller contains refrigerant under pressure. Repairs to the refrigerant circuit
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must not be attempted by untrained or unqualified individuals. Service must be
performed only by qualified HVAC technicians. Recover refrigerant before opening
the system.
Failure to heed the following may result in damage to equipment.
Service by unauthorized personnel will void the factory warranty.
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