60
TROUBLESHOOTING
PART 12: TROUBLESHOOTING
(CONTINUED)
Fault Code F05
TOP TEMP HIGH
F05
PUMP ON
Description:
This display indicates that the top temperature of the tank is excessive. If this code is accompanied
by the illuminated red ‘FAULT’ light and ‘LOCKOUT’ flashing on the display then this code indicates
that the temperature on the top sensor has exceeded 230 deg. F and a serious safety issue exists.
The unit will not restart until the cause of the excessive temperature is repaired by a technician and
pushes the RESET button on the display.
If the red ‘FAULT’ light is not illuminated, and this message is displayed then the top temperature of
the tank is at or above 210 Deg. F. The message will clear automatically when the temperature drops
below 194 Deg. F. During the time that this message or lockout fault is displayed, the 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 Resistance Table (12-1) in Part 12 in this manual.
2. Replace thermistor if necessary.
Fault Code F06
BOT TEMP HIGH
F06
PUMP ON
Description:
This display indicates that the bottom temperature of the tank is excessive. If this code is accompa-
nied by the illuminated red ‘FAULT’ light and ‘LOCKOUT’ flashing on the display then this code indi-
cates that the temperature on the bottom sensor has exceeded 230 deg. F and a serious safety issue
exists. The boiler will not restart until the cause of the excessive temperature is repaired by a tech-
nician and pushes the RESET button on the display.
If the red ‘FAULT’ light is not illuminated and this message is displayed then the bottom temperature
of the tank is at or above 210 Deg. F. The message will clear automatically when the temperature
drops below 194 Deg. F. During the time that this message or lockout fault is displayed, the 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 F09
NO FLAME ON IGN
F09
PUMP ON
Description:
The unit tried to ignite four times during a call for heat and failed ignition all four times. This code
indicates a serious safety issue and the unit will not restart until the cause of no ignition is deter-
mined by a technician and he pushes the RESET button on the display. The red light on the display
will illuminate and the word LOCKOUT flashing on the display. During this lockout fault, the pump
Summary of Contents for Phoenix Evolution
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