Pentair 300 Troubleshooting-Normal Operation of Heater, Power Service Current Temp SET TEMP/TIME

Troubleshooting—Normal Operation of Heater 29

3.After normal firing of the heater (main burners) the heater will continue to operate until the temperature setpoint is reached (thermostat satisfied). As the pool/spa loses heat the heater will refire and continue to operate cycling automatically to maintain the selected temperature setpoint for either the pool or spa. If at anytime during the firing of the heater an unsafe condition is detected the heater will stop firing and an automatic safe shutdown sequence will begin. Investigate and have corrected the cause of the abnormal firing termination before placing heater back in operation.

Please Note: During the firing of the heater, you decide to change to the pool or spa selection by depressing the selector key for “POOL” or “SPA”, the heater will first acknowledge the new selection by flashing the new selection’s corresponding selection LED “POOL” or “SPA”, however, the heater will first complete a safe shutdown sequence before automatically switching to the new selected setting and safely initiating a new firing sequence using the the new temperature setpoint. During this automatic crossover sequence the keyboard on the Pentair Temperature Controller 7800 will not accept any further keying until the cycle completes—the exception is you may still stop the heater with the “OFF” key.

POWER
SERVICE
	CURRENT TEMP			SET TEMP/TIME
POOL OR SPA
(DISPLAY ALTERNATELY
ON LCD TO SHOW ACTIVE SELECTION)
IGN	H-LMT	PRESS		FAN	AUX	TFUSE
FAULT CONDITION LCD ICONS
SET		POOL	OFF	SPA
PROGRAM					STEP

SYSTEM NORMAL

HEAT

TEMP

MODE

TEMP

Figure 24.

Illustration of Pentair Temperature Controller 7800 with all fault icons displayed for clarity.

Rev. C 11-1-01 P/N 471593