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Service Information
GENERAL OPERATION TROUBLESHOOTING GUIDE
Problem Probable causes Solutions
Entire spa is inoperative • Power failure
• RCD tripped
• Heater high limited thermostat tripped
• Spa Lock activated
• Check power source
• Reset RCD; call for service if it will not reset.
• Disconnect power for at least thirty seconds to reset
heater high limit. If it will not reset, check for clogged
filters. If tripping continues, call for service.
• Deactivate Spa Lock
Jets weak or surging • Spa water level too low
• Filter clogged
• Air valves are closed
• Add water
• Clean filter
• Open air valves
Light inoperative • Spa Lock activated
• Light assembly is faulty
• Deactivate Spa Lock
• Call for service
Both Power and Ready
Indicators Blinking
• Dirty filter
• Low water level
• Pressure switch problem
• Temperature sensor problem
• Clean filter
• See Start Up section in Owner’s Manual
• Disconnect power for at least thirty seconds. If flashing
continues after power up, call for service
Power Indicator Blinking
with four lines in display
area
• Heater high limit thermostat tripped • Disconnect power for at least thirty seconds to reset
heater high limit. If it will not reset, check for clogged
filter. If tripping continues, call for service
Ready Indicator Blinking • Temperature sensor problem • Disconnect power for at least thirty seconds. If blinking
continues after power up, call for service
Spa not heating properly • Temperature set too low
• Spa cover improperly positioned
• Dirty filter
• Summer Timer on
• Set control panel to a higher temperature.
• Align spa cover
• Clean filter
• Turn summer timer mode to off position
Pump motor will not
function
• Motor overload condition
• Control switch failure if jet symbol does not come
on
• Let cool for one hour. Motor overload will reset
automatically. If problem persists, contact your
CALDERA dealer
• Disconnect spa and contact your CALDERA dealer
Surging pump or motor • Low water level • Add water to normal level (2.5 cm [1"] above highest
jet)
Pump motor runs, but low
or no water/jet pressure
• Air control valve closed or blocked
• Low water level
• Dirty filter cartridge
• Jet blocked
• Clogged suction or skimmer basket
• Open or clean air valve
• Add water to normal level (2.5 cm [1"] above highest jet)
• Clean filter cartridge
• Remove jet face eyeball and clean orifice
• Clean suction cover or skimmer basket
Diverter valves are difficult
to turn
• Sand or grit inside valves • Clean and lubricate valve per diverter valve
maintenance instructions
After filling or refilling
the spa: a jet pump is
operating, but water is not
flowing from any of its jets.
• Pump is not properly primed.
• Turn off power to the spa at the breaker and remove the
equipment compartment door (see the "Draining Your Spa"
section for illustration).
• Loosen the union on the top of the pump(s) (see the
"Winterizing Your Spa" section for illustration) to allow the
air to escape, and then hand-tighten the union(s).
• Turn power back on, activate the pump, and check to
make sure the union is tight enough to keep it from leaking.
Replace the equipment doors.
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