Honeywell 7800 Series Product Data page 12

7800 SERIES S7800B DISPLAY MODULE
Fault Code
Fault 01 No card is plugged into the
No Purge Card purge card slot
Fault 02 Excess noise or device
AC Frequen/Noise running on slow AC.
Fault 03 AC Line dropout detected.
AC Line Dropout
Fault 04 Device running on fast AC.
AC Frequency
Fault 05 Low AC line detected.
Low Line Voltage
Fault 06 The purge card timing has
Purge Card Error changed from the original
configuration.
Fault 07 Flame not sensed when
Flame Amplifier checked for a nonself-check
version.
Fault 08 Flame sensed when
Flame Amp/Shutr checked for shutter-check
or ampli-check versions.
Fault 09 Flame sensed when shutter
Flame Detected open and no flame is
expected during Standby.
65-0219—1
Table 4. Fault Message and Recommended Troubleshooting.
System Failure
1. Assure the purge card is seated properly.
2. Inspect the purge card and the connector on the relay module for
damage or contaminants.
3. Reset and sequence the 7800.
4. If fault code reappears, replace the purge card.
5. Reset and sequence the 7800.
6. If fault persists, replace the relay module.
1. Check the relay module and display module connections.
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.
1. Check the relay module and display module connections.
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.
1. Check the relay module and display module connections.
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.
1. Check the relay module and display module connections.
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.
1. Assure that the purge card is seated properly.
2. Inspect the purge card and the connector on the relay module for
any damage or contaminants.
3. Reset and sequence the 7800.
4. If fault code reappears, replace the purge card.
5. Reset and sequence the 7800.
6. If code persists replace relay module.
1. Check wiring, correct any errors.
2. Assure that the flame detector and flame amplifier are compatible.
3. Remove the flame amplifier and inspect its connections. Reseat the
amplifier.
4. Reset and sequence the 7800.
5. If the code reappears, replace the flame amplifier and/or the flame
detector.
6. If fault persists, replace the relay module.
1. Check wiring, correct any errors.
2. Assure that the flame detector and flame amplifier are compatible.
3. Remove the flame amplifier and inspect its connections. Reseat the
amplifier.
4. Reset and sequence the 7800.
5. If the code reappears, replace the flame amplifier and/or the flame
detector.
6. If fault persists, replace the relay module.
1. Check that flame is not present in the combustion chamber, correct
any errors.
2. Check wiring, correct any errors.
3. Remove the flame amplifier and inspect its connections. Reseat the
amplifier.
4. Reset and sequence the 7800.
5. If the code reappears, replace the flame amplifier and/or the flame
detector.
6. If fault persists, replace the relay module.
Recommended Troubleshooting
12
(continued)