MiniMax® NT Series - Pentair
MiniMax® NT Series - Pentair
MiniMax® NT Series - Pentair
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40<br />
Troubleshooting<br />
THE SERVICE LIGHT<br />
1. The primary responsibility for the SERVICE Light is to illuminate whenever there is a problem<br />
that prevents the heater from firing (please see Diagnostic Lights explanation at the beginning of<br />
this section). However, it will also be ON during the Fan 15-second pre-purge and the 40-second<br />
Hot Surface Igniter heat up.<br />
2. The SERVICE Light also comes ON if the burners do not continue to burn properly or if the<br />
flame goes out, if there is a bad Flame Sensor or Flame Sensor wire or if anything else causes the<br />
Ignition Module to restart the ignition sequence. So, if the SERVICE Light comes ON and heater<br />
stops firing and then the heater fires and the SERVICE Light goes out, simulating a Rapid Cycle,<br />
it can be caused by a loss of or weak signal to the Ignition Module by the Flame Sensor.<br />
3. The SERVICE Light will come ON if the water temperature in the Inlet side of the Header<br />
reaches 115 degrees or if the water temperature at the outlet of the heat exchanger reaches 150<br />
degrees. If the heater is cycling in this mode, the three green lights on the back of the Control<br />
Board will flash OFF and ON as the heater shuts down and refires.<br />
NOTE<br />
If a weak Flame Sensor signal causes the cycling, the SERVICE Light will go ON and OFF, but<br />
the High Limit Light will remain ON. If water temperature causes the cycling, the SERVICE Light<br />
will go ON and OFF AND the High Limit will go ON and OFF as well.<br />
OUT<br />
EXT SWITCH<br />
RETURN<br />
POOL<br />
POTE<strong>NT</strong>IOMETER<br />
24 VAC PRESS HILMT TFUSE VALVE IGNITION MOD<br />
MODEL 6800<br />
ELECTRONIC THERMOSTAT<br />
SPA COM POOL<br />
TPROBE<br />
SPA<br />
POTE<strong>NT</strong>IOMETER<br />
PVALV LED<br />
TFUSE LED<br />
HITEMP LED<br />
Figure 36.<br />
FRO<strong>NT</strong> PANEL<br />
POOL / OFF/SPA<br />
THERMOSTAT SELECT SWITCH<br />
P/N <strong>NT</strong>SM03 Rev. B 2-11-04