Heater Will Not Fire Troubleshooting (A, B, C, D) - Pentair MASTERTEMP MT125HD Installation And User Manual

Heater Will Not Fire - D
IMPO RTANT! READ ME FIRST! !
If your heater is correctly connected to 240 Volts AC, the
Ignition Control Module (ICM) will convert the 240V AC to
an intermittent pulse to the ignitor. Digital meters don't read
this type of signal well. (An analog meter will give a better
reading than a digital meter). If the ICM is bad, your volt-
Start
Gas flows during igni-
tion try, but burner
does not fire.
YE S
Check voltage across
igniter leads; OK?
NO
Replace Ignition
Control Module.
IMPORTANT! READ ME FIRST!
NO
Go back to chart "HEATER WILL
NOT FIRE-C" (Page 28).
YE S
Check gas pressure. OK?
Increase gas flow into heater:
• Replace gas line with larger
line;
• Replace regulator;
• Replace meter; or
• All of the above.
Section 3. Troubleshooting
meter will read either 0 VA C or 240 VAC. If your ICM is
good, your meter will read some voltage between 0 and
240 VAC. Exactly what reading you get will depend on the
meter, but with a good ICM, the reading won't be 0 VA C or
240 VAC, but somewhere in between.
YES
NO
MasterTemp 125 Pool and Spa Heater Installation and User's Guide
Replace HSI Igniter.
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