Pentair NT Standard Series installation manual Service Checks-Ignitionmodule

Troubleshooting—Normal Operation of Heater 27

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 23.

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

SERVICE CHECKS—IGNITION MODULE

Service Checks

Symptom		Cause/Cure
1.	Dead	A. Miswired
		B. Transformer bad
		C. Fuse/Circuit breaker bad
		D.	Bad control (check LED for steady on)
2.	Thermostat on—no ignition	A.	Miswired
		B. Bad thermostat no voltage at terminal W
3.	Valve on, no ignitor	A.	Defective ignitor
		B.	Miswired
		C. Bad control (check voltage at ignitor)
4.	Ignitor on, no valve	A.	Valve coil open
		B. Open valve wire
		C. Bad control (check voltage between V1 & V2)
5.	Flame okay during TFI,	A.	Bad ignitor
	no flame sense (after TFI)	B.	Bad S1 wire
		C. Poor ground at burner
		D.	Poor flame (check flame current)

Rev. A 1-2-02 P/N 472032