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Refrigerant Low Pressure Control: Stops the com- pressor if refrigerant suction (low side) pressure falls too low as a result of a malfunction, loss of charge or extreme cold conditions. Indicator Lamps: There are 6 indicator lamps located on the unit control panel (see Fig. 3 below): • Power (amber lamp): When lit, indicates power is applied to the unit. • Water Flow (green lamp): When lit, indicates nor- mal water flow. • Heat Demand (green lamp): When lit, indicates the actual water temperature is below the target water temperature. WARNING: Install a check valve and/or a Hartford loop AFTER the heat pump pool heater and BEFORE any chlorinating devices. Install any auto- matic chemical feeders AFTER the heat pump pool heater. Improper installation of any type of auto- matic chemical feeders can result in serious damage to, or premature failure of, the heat pump pool heater and will void the heat pump pool heater warranty. NOTE: The heat pump pool heater will not run when the Remote position is selected on the Pool/Spa selector switch and there is no remote control sys- tem attached. Fig. 3: Indicator Lamps — Analog Models NOTE: The heat pump pool heater will not run when the Remote position is selected on the Pool/Spa selector switch and there is no remote control sys- tem attached. • Compressor Delay Active (amber lamp): Under normal operation, when lit, indicates compressor anti-short cycle timer is active. The fan will run but the compressor will be OFF for 6 to 8 minutes. • Defrost Active (red lamp): When lit, indicates unit is in defrost mode. Defrost mode occurs when ice starts to form on the outside coil. The fan will continue to run but the compressor will stay OFF (not heating) until weather conditions improve. • Low Pressure (red lamp): When lit, indicates failure in the refrigeration circuit. When this lamp is ON, service is required. Call for service assistance. System Start-Up 1. Verify that the Power lamp is ON and that the pool/spa pump is running and circulating properly. 2. Verify that the control panel Spa-Remote-Pool switch is in the Remote (OFF) position; see Fig. 4 below. 3. Turn the control switch to either Pool or Spa to turn the system ON and raise the thermostat setting above the current water temperature. At this time the 2 green lamps should illuminate. The fan and compressor should start up and run simultaneously. Fig. 4: Selector Knobs — Analog Models NOTE: The heat pump pool heater will not run when the Remote position is selected on the Pool/Spa selector switch and there is no remote control sys- tem attached. 4. Allow the heat pump pool heater to operate for a few minutes to stabilize operating pressures and to allow various component temperatures to normalize. 5. Verify that the discharge air temperature is approximately 8°–10° cooler than the air entering the unit. If not, see the Troubleshooting Section. Controls (Digital Models) Your heat pump pool heater incorporates digital safety controls and indicators to ensure its safe, reliable operation (for models with analog controls, see page 10). Water Pressure Switch: Prevents operation when the pump is OFF. The unit requires 5 psi minimum pressure. Digital Water Temperature Control: The pool water temperature is controlled by the heat pump pool heater’s digital control system, which gives you the option of two settings: one for the desired spa temperature and the other for the desired pool temperature. Additionally, as mentioned earlier, the unit is compatible with most ‘2-wire’ and ‘3-wire’ control/automation systems. Fig. 5: Digital Water Temperature Control Defrost Sensor: Prevents unit operation if ambient air temperature falls below a predetermined safe minimum (approximately 42°–48°F, based on humidity). The compressor will shut OFF but the fan will continue to run. Delay Timer: Prevents compressor from short cycling, which could damage or destroy the hermetic motor/compressor. Upon water temperature control satisfaction, or other circuit interruptions, this solid state device will prevent compressor restart for approximately 5 minutes. 11 Digital Controls Operating Instructions The electronic board has the capability of memorizing two different programmed temperature settings as follows (refer to Fig. 5): • For a pool, maximum 95°F (35°C) • For a spa, maximum 104°F (40°C) To Select Pool or Spa Mode To have access to either one of these programs, press the SET key until you see P _S and by pressing the UP or DOWN key you can switch to POL or SPA. To Increase the Desired Water Temperature (Pool or Spa Mode) Push the SET key until you see POL or SPA. The programmed temperature will be displayed. Press the UP arrow to increase the temperature setting one degree at a time. To Lower the Desired Water Temperature (Pool or Spa Mode) Push the SET key until you see POL or SPA. The programmed temperature will be displayed. Press the DOWN arrow to decrease the temperature setting one degree at a time. Once the control has been...

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