Rheem M8350ti Installation Instructions - Page 11

• Compressor Delay Active (amber lamp): Under 4. Allow the heat pump pool heater to operate for a normal operation, when lit, indicates compressor few minutes to stabilize operating pressures and to anti-short cycle timer is active. The fan will run but allow various component temperatures to normal- the compressor will be OFF for 6 to 8 minutes. ize. • 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. 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. 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 system attached. 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