Fulton Pulse DWH (PDWH) Domestic Water Heater - Manual (Page 40)

37-PDWH
Maintenance
Fault Code System Failure Recommended Troubleshooting
Fault 02 Excess noise or device running on 1. Check the relay module and display module connections.
*AC Frequen/Noise* slow AC. 2. Reset and sequence the 7800.
3. Check the 7800 power supply to assure that both
frequency and voltage meet specifications.
4. Check the backup power supply as appropriate.
Fault 03 AC Line dropout detected. 1. Check the relay module and display module connections.
*AC Line Dropout* 2. Reset and sequence the 7800.
3. Check the 7800 power supply to assure that both
frequency and voltage meet specifications.
4. Check the backup power supply as appropriate.
Fault 04 Device running on fast AC. 1. Check the relay module and display module connections.
*AC Frequency* 2. Reset and sequence the 7800.
3. Check the 7800 power supply to assure that both
frequency and voltage meet specifications.
4. Check the backup power supply as appropriate.
Fault 05 Low AC line detected. 1. Check the relay module and display module connections.
*Low Line Voltage* 2. Reset and sequence the 7800.
3. Check the 7800 power supply to assure that both
frequency and voltage meet specifications.
4. Check the backup power supply as appropriate.
Fault 32 Combustion airflow interlock fault. 1. Check wiring--correct any errors.
*Airflow Switch* 2. Inspect the fan, assure that there is no blockage of the air
intake and that it is supplying air.
3. Assure that the Airflow Interlock switches are functioning
properly and that their contacts are free from contaminants.
4. Reset and sequence the 7800 to Prepurge. Measure the
voltage between terminal 7 and G (ground). 120 Vac
should be present.
Fault 47 The configuration jumpers differ 1. Inspect the jumper connections. Assure that clipped
*Jumpers Changed* from the sample taken at startup. jumpers have been completely removed.
2. Reset and sequence the 7800.
3. If fault persists, replace the relay module.
Fault 54 Combustion pressure switch fault 1. Check wiring; correct any errors.
*Comb. Pressure* 2. Inspect the Combustion Pressure Switch to assure that it
is functioning properly.
3. Reset and sequence the 7865.During standby or
prepurge, measure the voltage between terminal 20 and
G (ground). 120 Vac should be present. If not, the
combustion pressure switch may be defective and need
replacement.
4. If fault persists, replace the relay module.
Fault 55 Purge fan switch is on when it 1. Check wiring; correct any errors.
*Purge Fan Sw. On* should be off. 2. Inspect the Purge Fan Switch terminal 18 and
connections. Assure that the switch is functioning
correctly and is not jumpered or welded.
3. Reset and sequence the 7865.
4. If the fault persists, replace the relay module.
Fault 57 Purge fan switch is off when it 1. Inspect the Purge Fan Switch terminal 18 and
*Purge Fan Sw. Off* should be on. connections. Assure that the switch is functioning
correctly.
2. Reset and sequence the 7865.
3. If the fault persists, replace the relay module.
Faults 105-127 Call Service. 1. Replace 7865 controller.
Troubleshooting--Fault Code Diagnosis