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S
ervIce
I
nformatIon
GENERAL INFORMATION
Your
CALDERA
spa has been designed to provide years of trouble-
free use. As with any appliance, problems may occasionally occur that
require the expertise of a qualified service person. Though such simple
repairs as resetting a RCD breaker, or resetting a high limit thermostat
may not require a service call, they may indicate that a more serious
condition exists. These conditions may require an experienced service
person. Before calling for service, please refer to the Troubleshooting
Guide. Always retain your original sales receipt for future reference.
RCD AND HIGH LIMIT THERMOSTAT
If your spa fails to operate at any time, first check the power supply to
the spa.
Check each of the RCD breakers in the subpanel. If a RCDI has tripped,
reset it. If it will not reset, this may be an indication of a ground fault
(short circuit) within the electrical components. Contact an Authorized
Service Technician for a complete diagnosis.
If upon checking the RCD’s you find that they have not tripped, check
the house breaker panel and ensure the main breaker for the electrical
circuit supplying the spa has not tripped. If it has, this is an indication
that the circuit was either overloaded or a ground fault exists between
the breaker panel and the spa receptacle or subpanel. Contact a
qualified electrician.
If upon checking the main house breaker and spa RCD’s you find no
failures, check the high limit thermostat. To check it, simply turn off
power to the spa for 30 seconds. This will automatically reset the high
limit thermostat if it has tripped. If the spa energizes once you turn the
power back on, this indicates reduced water flow through the heating
system. Tripping of the high limit thermostat is normally a result of
one or a combination of these problems. 1) clogged filter cartridge(s),
2) blockage within the system plumbing, 3) a non-functioning heater
circulation pump, 4) power was not disconnected from the spa before it
was drained, 5) an air lock in the plumbing lines. (The Power Indicator
on the front of the spa’s control panel will also be blinking if the high limit
thermostat circuit has tripped.)
If the spa does not function after tripping and resetting the RCD’s or
resetting the high limit thermostat, then the problem should be referred
to an Authorized Service Technician. Refer to the Troubleshooting Guide
for additional service information.
HEATER AND INTEGRATED
PRESSURE SWITCH
Watkins Wellness unconditionally warrants the heater against any failure
that would require replacement. This warranty’s duration is equal to
the time period identified in the Heater Warranty. This warranty defines
unconditional as warranty coverage without exception provided that the
component has failed to operate properly within the spa’s system. This
means that conditions that would normally invalidate the limited
warranty, such as water chemistry damage, do not apply to the heater.
It is important to note that the heater is protected by both the heater high
limit thermostat circuit and the integrated pressure switch. The causes of
heater high limit tripping are discussed in the previous section.
If the spa is not heating, the red and green lights are blinking, but
the pump and light are operating, then the pressure switch may be
open. Opening of the pressure switch is normally a result of one or a
combination of these problems:
1. A clogged filter cartridge
2. Blockage within the system plumbing
3. Power was not disconnected to the spa before it was drained
4. An air lock in the plumbing lines
5. Circulation pump not properly working
Once the problem has been identified and corrected the pressure switch
will close which will energize the heater.
CIRCULATION PUMP AND
CIRCULATION PUMP THERMAL
CUT-OFF
The circulation pump is a dedicated, water cooled, energy efficient, quiet
pump that provides continuous filtration for the spa. Since the pump is
water cooled, it is equipped with a thermal cut-off to prevent the pump
from being damaged by running hot when water is not present.
Reset the circulation pump’s thermal cut-off by disconnecting power to
the spa and allowing the pump to cool.
Tripping of the thermal cut-off is normally the result of one or a
combination of these problems: 1) clogged filter cartridge(s), 2) blockage
within the system plumbing, 3) power was not disconnected to the spa
before it was drained, or 4) an air lock in the plumbing lines. Once the
problem has been identified and corrected the pump thermal cut-off will
be able to be reset which will allow it to operate normally.
MISCELLANEOUS SERVICE
INFORMATION
The control and high-limit thermostats are equipped with electronic
sensors that are connected to the spa’s plumbing. Never cut or kink the
wires that connect the sensors to the thermostats within the control box.
The jet pump is equipped with a thermal overload cutoff switch that is
designed to protect the pump from overheating. If the pump shuts itself
off in an older spa, it could indicate failure of the pump motor bearings. If
the pump shuts itself off in a new spa, it is usually the result of one or a
combination of the following factors:
• Thermal overload: Although mass-produced, not all thermal overload
cutoffs are exactly the same. Some are more sensitive than others and
will shut the pump off at lower temperatures.
• High temperature: All
CALDERA
spa models are equipped with a jet
pump shroud that vents the heat generated by the pump motor to the
outside of the equipment compartment, and back into the spa water. If
the vent is blocked by masonry, grass or debris, overheating of the jet
pump may occur. Once the pump motor has cooled sufficiently and any
blockage has been removed from the vent opening, the jet pump can
be restarted.
• Friction: Sometimes the moving parts of a new pump are tight enough
to cause heat build-up due to friction. After a normal break-in period,
the pump will run cooler.
• Improper wiring: If the spa is connected with an extension cord, and/
or the house wiring is undersized, the pump may starve for voltage and
therefore may draw more amperage and generate excessive heat.
• If the pump is shutting down due to excessive heat, make sure the
equipment compartment has adequate ventilation. The air gap at the
bottom must not be blocked. Should your jet pump continue to shut off
after short periods of use, contact a qualified service technician.
Service Information
