Pentair MiniMax Plus HP Series, PowerMax Troubleshooting Controls, Heat Heat, Service Service

Operation (contd.) 9

HEAT (HEAT)

The heat light is on any time the thermostat has signaled a call for heat which initializes the ignition safety firing circuit -- the light comes on to indicate successful firing of the main burners.

SERVICE (SERVICE)

The service light is off during normal operation of heater. The light only comes on if a problem with a control has occurred or when the heater is first firing. The problem must be investigated by the serviceman prior to attempts to fire the heater again.

The diagrams that follow give examples of troubleshooting a malfunctioning heater using the assistance of the indicator lights.

TROUBLESHOOTING (CONTROLS)

Example of troubleshooting with the assistance of the indicator lights.

			SYMBOL TABLE
				SWITCH OR DEVICE		SWITCH OR DEVICE
				OPEN CIRCUIT
			LED OFF			CLOSED CIRCUIT
		LED LIT		(BLOCK CURRENT)
						(PASS CURRENT)
							IGNITION MODULE
						IND	GND	VAL
INCOMING	TRANSFORMER	CIRCUIT			HI TEMP			GAS VALVE
			REMOTE	PRESS		TFUSE		MV
LINE VOLTAGE		BREAKER			LIMIT SWITCHES

MV

THERMOSTAT

RELAY

THERM	POWER
AUX	SERVICE
PRESS
HEAT
	FRONT PANEL LEDS

PWR	TSTAT	RMT	PRESS	HI TEMP	TFUSE	MV	HEAT
				SRVE
				CLOSE IF
				NO MV

THERMOSTAT CIRCUIT BOARD

WATER AT SELECTED TEMPERATURE.... NORMAL OPERATION

OR POOL/OFF/SPA THERMOSTAT SELECT SWITCH OFF.... NORMAL OPERATION

INCOMING TRANSFORMER

LINE VOLTAGE

THERM	POWER
AUX	SERVICE
PRESS
HEAT
	FRONT PANEL LEDS

						IGNITION MODULE
					IND	GND	VAL
CIRCUIT		REMOTE	PRESS	HI TEMP	TFUSE
BREAKER				LIMIT SWITCHES
	THERMOSTAT
	RELAY
PWR	TSTAT	RMT	PRESS	HI TEMP	TFUSE	MV	HEAT
				SRVE

CLOSE IF

NO MV

THERMOSTAT CIRCUIT BOARD

THERMOSTAT CALLING FOR HEAT - PUMP OFF(NO PRESSURE) BLOCKS FIRING NORMAL OPERATION

GAS VALVE MV

MV

Rev. G 1-22-04 P/N 471048