MiniMax® NT Series - Pentair
MiniMax® NT Series - Pentair
MiniMax® NT Series - Pentair
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32<br />
Troubleshooting<br />
DIAGNOSTIC LIGHTS SHOW<br />
“POWER” ONLY!<br />
1. Check water temperature, if water has reached the desired temperature, the thermostat will cut<br />
off power to the module and the heater will stop firing. In this case the POWER Light would<br />
remain ON.<br />
2. Check the voltage on the Secondary side of the Transformer. It should be greater than 24 VAC.<br />
If the voltage is less than required, the incoming voltage may be too low for the heater to operate<br />
properly, there could be a wiring short or the wrong voltage connector may be connected to the<br />
White Male Connector. Because the Power light is not a specific 24 VAC light, it will illuminate<br />
with less than 24 VAC, so even if the Power Light is ON, the voltage may not be correct.<br />
3. The Pool/Spa switch may have inadvertently been switched Off. Even though the Pool/Spa<br />
switch does not have to be ON for the POWER Light to be ON, it does have to be pushed to<br />
either the Pool or Spa position in order to transfer voltage to the rest of the controls.<br />
4. Make sure that the Thermostat Knobs have been turned to Hot because the voltage must pass<br />
through the thermostat (potentiometer) first before going to any other control. If the<br />
potentiometer or thermistor is not working or is disconnected from the Control Board, only the<br />
POWER Light will be ON. If you suspect that this may be the problem, first check the<br />
thermistor connections on the back of the Control Board. If this does not light the T-STAT Light,<br />
connect a known functional thermistor to the Control Board. If the light still does not come on,<br />
the Control Board is bad.<br />
Figure 26.<br />
P/N <strong>NT</strong>SM03 Rev. B 2-11-04