The heat pump pool heater has automatic defrost. When the outdoor temperature drops below 40°F, frost
may start to form on the evaporator coil. Frost buildup will be heaviest on humid days when the temperature is
between 35 and 40°F. During the defrost cycle, the display will show “DEF” indicating the unit is defrosting.
During this time the compressor is inactive.
INTERNAL PROTECTION ANALYZERS
The heater is equipped with internal devices to monitor and protect the integrity of the unit. If an abnormal
condition occurs, the device will interrupt the operation of the unit and may display the appropriate code on
the control panel.
• LOW WATER FLOW: Indicated by “HP” or “HP3” on the control panel. The heater is designed to run
efficiently above twenty (20) GPM. If there is insufficient water flow, the unit will shut down, protecting
the compressor. The usual causes for these conditions are a dirty pool water filter, a restriction in the
return line (i.e. skimmer), or improper valve positioning.
• NO WATER FLOW: Indicated by “FLO” on the control panel. When the filter pump is off, or if the water
flow to the heater is interrupted during the heating mode, the internal water pressure switch will shut
down the unit. When normal water flow resumes, the heater will automatically restart itself.
• Other analyzer codes include: “LP”, “tSO”, “tSS” and “ESO” and “ESS”.
The TROUBLESHOOTING CHECKLIST on page 9 goes into further detail on these analyzer codes.
MAINTENANCE
WARNING: DISCONNECT ELECTRICAL POWER TO UNIT BEFORE STARTING ANY MAINTENANCE
TO PREVENT SERIOUS INJURY FROM SHOCK.
Protecting your Heater
• Keep your pool filter system clean and free of restrictions to ensure proper water flow.
• Check water chemistry regularly. Misuse of chemicals will cause permanent damage to your heater and
other pool equipment. Manufacturers can void warranties for damage as a result of poor water quality.
• Free airflow is essential. Keep the evaporator coil clean and free of weeds, leaves, glass clippings, dirt
and other debris that will decrease the airflow. Keep fences and shrubs away from air inlets (sides and
back of heater).
• Frequent rinsing of the evaporator with fresh water will remove build up from its surface. Always spray
the coil gently with a regular garden hose being careful not to bend aluminum fins.
• Regular cleaning of the cabinet will improve its appearance and extend the life of the finish.
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OWNER’S MANUAL
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10
DEFROST CYCLE
