Bradford White Brute BNTH Installation And Operation Instructions Manual page 70

Page 66
94 Header sensor
fault
95 Stack sensor
fault
96 Outdoor sensor
fault
97 Internal Fault:
A2D mismatch.
98 Internal Fault:
Exceeded
VSNSR voltage
tolerance
99 Internal Fault:
Exceeded
28V voltage
tolerance
100 Pressure Sensor
Fault
105 Flame detected
out of sequence
106 Flame lost in
MFEP
107 Flame lost early
in run
108 Flame lost in run
H 1. Check wiring and correct any possible errors.
2. Replace the header sensor.
3. If previous steps are correct and fault persists, replace the module.
H 1. Check wiring and correct any possible errors.
2. Replace the stack sensor.
3. If previous steps are correct and fault persists, replace the module.
H 1. Check wiring and correct any possible errors.
2. Replace the outdoor sensor.
3. If previous steps are correct and fault persists, replace the module.
L Internal Fault.
1. Reset module.
2. If fault repeats, replace module.
L Internal Fault.
1. Reset module.
2. If fault repeats, replace module.
L Internal Fault.
1. Reset module.
2. If fault repeats, replace module.
H 1. Verify the Pressure Sensor is a 4-20 ma source.
2. Check wiring and correct any possible errors.
3. Test Pressure Sensor for correct operation.
4. Replace the Pressure sensor.
5. If previous steps are correct and fault persists, replace the module.
H or L 1. Check that fl ame is not present in the combustion chamber. Correct
any errors.
2. Make sure that the fl ame detector is wired to the correct terminal.
3. Make sure the F & G wires are protected from stray noise pickup.
4. Reset and sequence the module, if code reappears, replace the fl ame detector.
5. Reset and sequence the module, if code reappears, replace the module.
L 1. Check main valve wiring and operation - correct any errors.
2. Check the fuel supply.
3. Check fuel pressure and repeat turndown tests.
4. Check ignition transformer electrode, fl ame detector, fl ame detector
siting or fl ame rod position.
5. If steps 1 through 4 are correct and the fault persists, replace the module.
L 1. Check main valve wiring and operation - correct any errors.
2. Check the fuel supply.
3. Check fuel pressure and repeat turndown tests.
4. Check ignition transformer electrode, fl ame detector, fl ame detector
siting or fl ame rod position.
5. If steps 1 through 4 are correct and the fault persists, replace the module.
L 1. Check main valve wiring and operation - correct any errors.
2. Check the fuel supply.
3. Check fuel pressure and repeat turndown tests.
4. Check ignition transformer electrode, fl ame detector, fl ame detector
siting or fl ame rod position.
5. If steps 1 through 4 are correct and the fault persists, replace the module.
B W
RADFORD HITE