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SECTION 5 - TROUBLESHOOTING
5.1 Fault Codes
A fault code indicates a specific issue or condition that will require action before the equipment can resume
operating.
Please perform the following troubleshooting.
If the issue reoccurs, please contact the installing dealer. Or contact AquaCal
partner in your area. See "Contacting AquaCal AutoPilot, Inc." on page 1.
WARNING - 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 heat pump contains refrigerant under high pressure. Repairs to the refrigerant circuit must not be attempted
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by untrained or unqualified individuals. Service must be performed only by qualified HVAC technicians.
Recover refrigerant before opening the system.
CAUTION - Failure to heed the following may result in equipment damage.
Service by unauthorized personnel will void the heat pump warranty.
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FLO Indicator
ISSUE
Low or no water detected.
RESOLUTION
1. Confirm the filter pump is on.
2. If a multiple-speed filter pump is being used, run at a higher speed to determine if the error persists. Do not
exceed maximum flow rate for your model.
3. Confirm water is not being diverted away from the heat pump.
See "Water Flow Rates" on page 9.
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See "Adjusting Water Flow Using ΔT (Delta-T)" on page 10.
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CEr Indicator
ISSUE
This can indicate a loose or damaged communication cable.
RESOLUTION
A qualified technician should check the cable from control board to display assembly for a loose connection
or visible damage.
CSE Indicator
ISSUE
This is a control system error.
RESOLUTION
Deactivate then reactivate power to reset controls.
dpC or dPO Indicator
ISSUE
Shorted or open defrost sensor.
RESOLUTION
A qualified technician should replace the defrost sensor.
Page - 16
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for a service
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