MiniMax® NT Series - Pentair

30
Troubleshooting
DIAGNOSTIC LIGHTS
1. The POWER Light indicates voltage to the
Control Board from the Transformer. The
POWER light will be ON without pushing the
Pool/Spa switch as long as there is power being
supplied to the transformer.
2. The TSTAT Light or Thermostat Light will
come ON if there is voltage to the
Potentiometers and they are turned to the Hot
Position and the water temperature is below
the hot set point.
3. The AUX Light or Remote Switch Light will
come ON if the Remote control is operating
properly and/or is attached to the back of the
Control Board correctly. If the heater is not
connected to a remote switch, there will be a
small jumper wire attached to the Control
Board to make the light come on.
4. The PRESS Light is attached to the Pressure
Switch and will come ON if the Pump is ON
and is pumping enough water to create
adequate water pressure to close the contacts
on the Pressure Switch.
5. The HEAT Light is attached to the MV
(Main Valve) terminal on the Control Board.
This terminal does not receive voltage until
the Hot Surface Igniter (HSI) has been ON for
40 seconds. Once voltage is sent to the Gas
Valve, it should open to allow gas flow to the
burners that will be ignited by the HSI.
6. The SERVICE Light is a dual-purpose light.
When there is a call for heat the Service Light
will be ON during the 15-second pre-purge and
the 40 second Hot Surface Igniter (HSI)
heat-up period. The Service Light will be OFF
during the 7 second trial for Ignition when the
HEAT Light comes ON. If the burners fire
and the Flame Sensor sends a signal to the
Ignition Module that there is a successful
ignition, the Service Light will stay OFF and
the Heat light will stay ON. The Service light
will also be ON if there is a problem with one
or both of the High Limit Switches, the
Thermal Fuse or the Valve (VAL) output on
the Ignition Module.
Figure 24.
P/N NTSM03 Rev. B 2-11-04