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

Page 27
Image 27
Pentair NT Standard Series installation manual Service CHECKS-IGNITION Module, Troubleshooting-Normal Operation of Heater