Pentair Pool Products MiniMax NT Series Service Manual page 31

Troubleshooting
MiniMax NT Series Heater Troubleshooting/Check List
1. Look at the lights, which ones are on? Review Diagnostic Lights section on previous page.
2. Check for correct voltage on Secondary side of Transformer. Should be greater than 24 VAC
at Orange Wire at 24 V position on Control Board.
3. Check all wire connections on Module, Control Board, HSI, Flame Sensor and Gas Valve.
4. Check position of HSI and Flame Sensor to Burners.
5. Check for true ground and good ground connections.
6. Push the Pool/Spa switch ON to the opposite side and then the thermostat from cold to hot.
7. Make sure that the pump is running with a full prime and that the filter pressure is not too
high or low.
8. Remove any Remote Control wires from the heater Control Board and replace with the jumper
wire while testing.
MiniMax NT (Standard) Wire Connection
TRANSFORMER
WHITE MALE
CONNECTOR
BLOWER
PENTAIR 6800
DUAL
ELECTRONIC
THERMOSTAT
Figure 25.
Rev. B 2-11-04
GREEN
AIR PRESSURE SWITCH
THERMOSTAT SWITCH
THERMISTOR PROBE
POOL/OFF/SPA
IGNITOR
FLAME SENSOR
WHITE
BLUE
WHITE
RED
GREEN
HILIMITS
GAS VALVE
WHITE
WHITE
WATER
PRESSURE
SWITCH
240 OR 120VAC
WHITE
120VAC
BLACK
BLUE FEMALE
CONNECTOR
WHITE
240VAC
BLACK
RED/BROWN FEMALE
CONNECTOR
POWER SWITCH
TERMINAL BLOCK
31
GREEN
FIELD
SUPPLIED
120 VAC
OR
240 VAC
60 Hz
POWER TERMINAL
BLOCK
BOND LUG
(ON THE SIDE OF JACKET)
P/N NTSM03