59
TROUBLESHOOTING
PART 12: TROUBLESHOOTING
(CONTINUED)
Fault Code F01
FLUE TEMP
F01
PUMP ON
Description:
This display indicates that the flue temperature limit switch of the unit has tripped. This code indi-
cates a serious safety issue. The unit will not restart until the flue cools down sufficiently and a tech-
nician repairs the cause of the problem and pushes the RESET button on both the device and the
display. This situation is indicated by the red light on the display illuminating and the word LOCK-
OUT flashing on the display. During this lockout fault, the pump will be on as indicated on the sec-
ond line of the display.
Remedy:
1. Check the flue for obstructions or any sign of damage especially signs of excessive heat.
Repair as necessary. Push the red reset button on flue temperature switch located on CPVC
vent elbow. NOTE: Switch temperature must be less than 90°F to reset. Press the Reset button
on the display. Run the unit and check the flue temperature by using an external thermometer
in the flue pipe. If the flue temperature is below 190° and the switch trips, replace the switch.
If the flue temperature is excessive, check and adjust the combustion controls on the unit.
Fault Code F02
TOP TEMP SENSOR
F02
PUMP ON
Description:
This display indicates that the top temperature sensor of the tank has failed. This code indicates a
serious safety issue and the unit will not restart until the sensor is replaced by a technician and push-
ing the RESET button on the display. This situation is indicated by the red light on the display illu-
minating and the word LOCKOUT flashing on the display. During this lockout fault, the circulator
pump will be on as indicated on the second line of the display.
Remedy:
1. Check the electrical connection to the thermistor on the outlet manifold. Verify 5 VDC by check-
ing in Molex connector. If no 5 VDC, check harness. If harness is OK, replace control. NOTE:
Verify thermistor values by referencing chart in this manual.
2. Replace thermistor if necessary.
Fault Code F03
BOT TEMP SENSOR
F03
PUMP ON
Description:
This display indicates that the bottom temperature sensor of the unit has failed. This code indicates
a serious safety issue. The unit will not restart until the sensor is replaced by a technician and he
pushes the RESET button on the display. This situation is indicated by the red light on the display
illuminating and the word LOCKOUT flashing on the display. During this lockout fault, the pump will
be on as indicated on the second line of the display
Remedy:
1. Check the electrical connection to the thermistor, check harness. If harness is OK, replace con-
trol. NOTE: Verify thermistor values by referencing chart in this manual.
2. Replace thermistor if necessary.
Summary of Contents for Phoenix Evolution
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