Leisure Temp LT1000, Operation Manual

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Heat Pump Is Running, Not Heating
ISSUE
The heat pump is running. But the water is not heating.
RESOLUTION
1. If the heat pump is using an external controller, confirm it is set correctly.
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See " Operating Heat Pump (With an External Controller) " on page 14.
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If the heat pump is still not running correctly with this device, contact the installer of the device or
the device’s manufacturer for further assistance.
2. Confirm heat pump mode is set to heat.
3. Confirm thermostat is set to the desired water temperature.
4. Confirm valves are positioned to heat the correct body of water (either the pool or the spa). If heating a
spa that overflows into a pool, confirm the spa is isolated when being heated (not flowing into the
pool).
5. Confirm heat pump is transferring heat into the water.
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Measure the temperature of air discharge coming out of the heat pump fan. If discharge air is
between 8° to 10° F (4.4° to 5.6° C) colder than the outside ambient air, the heat pump is moving
heat into the water.
6. If an error code is displayed, diagnose and correct cause of code.
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See " Fault Codes " on page 27.
7. Confirm that the filter pump has a sufficient run-time. The heat pump will not run (or heat the
water) without water flow.
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See " Heating Recommendations " on page 39.
8. If heating a spa, deactivate air blower or venturi (if equipped) to allow for quicker heating times. For
pools, deactivate water features, such as slides, waterfalls, or fountains to allow water to retain heat.
Use of a liquid pool blanket product can also compensate for excessive heat loss.
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