Honeywell 7800 Series Product Data page 18

7800 SERIES S7800B DISPLAY MODULE
Table 4. Fault Message and Recommended Troubleshooting (continued) .
Fault Code
Fault 46 This fault indicates either
Flame Amp Type that the Flame Failure
Response Time (FFRT) or
TYPE input from the
Amplifier changed while the
device was powered, or that
a standard amp has been
used in a pilot valve
application or a three
second FFRT Amplifier has
been used with the relight
option on the RM7890.
Fault 47 The configuration jumpers
Jumpers Changed differ from the sample taken
at startup.
Fault 48 V2S valve terminal, used as
Delayed MV On a delayed main valve, was
on when it should be off.
Fault 49 The manual open switch
Man-Open Sw. On was on when it should be
off.
Fault 50 The sequence logic has
Jumpers Wrong detected a combination of
jumpers that is illegal for the
sequence (e.g., if it was
correct to clip jumper 1 or
jumper 2, but not both, this
fault would be used if both
were clipped).
Fault 51 Flame signal value is too
Flame Too Strong high to be valid.
Fault 52 Pilot Valve 2 terminal was
Internal Fault off when it should be on.
Fault 53 Lockout Input fault.
Lockout Switch
65-0219—1
System Failure
1. Remove power to the device. Reseat the flame amplifier. Reset and
sequence.
2. For RM7890 only: Assure that if a three second Flame Failure Re-
sponse Time amplifier is being used, Jumper 2 is completely
clipped. Conversely, if Jumper 2 is intact (Relight option has been
selected), a 0.8 second Flame Failure Response Time amplifier
must be used with this configuration.
3. For RM7838B only: Assure that a Shutter Check Flame Amplifier is
being used when the Pilot Valve Hold option has been selected.
1. Inspect the jumper connections. Assure that clipped jumpers have
been completely removed.
2. Reset and sequence the 7800.
3. If fault persists, replace the relay module.
1. Warning! Remove system power, turn off fuel supply.
2. Check wiring, correct any errors.
3. Inspect the V2S Fuel Valve and its connections. Assure that its
switch is functioning properly and is not jumpered or welded.
4. Reset and sequence the 7800.
5. If the fault persists, replace the relay module.
1. WARNING! Remove system power; turn off fuel supply.
2. Check wiring; correct any errors.
3. Inspect the Manual-Open Switch and its connections. Assure that
its switch is functioning properly and is not jumpered or welded.
4. Reset and sequence the 7800.
5. If the fault persists, replace the relay module.
1. Inspect jumpers and consult the instruction and installation guide for
compatible jumper configurations. Assure clipped jumpers are
completely removed.
2. Reset and sequence the 7800.
3. If fault persists, replace the relay module.
1. Assure that flame detector and flame amplifier are compatible.
2. Remove the flame amplifier and inspect its connectors. Reset the
flame amplifier.
3. Reset and sequence the 7800.
4. Check the flame detector sighting position, reset and cycle.
Measure flame strength. Does it meet specifications? If not, refer to
flame detector and/or flame amplifier checkout procedures in
installation and instruction sheets.
5. If the code reappears, replace the flame amplifier and/or the flame
detector.
6. If fault persists, replace the relay module.
1. Inspect Pilot V25 terminal 21 and connections. Assure that Pilot
V25 is functioning properly.
2. Reset and sequence the 7800.
3. If fault persists, replace the relay module.
1. Check wiring; correct any errors.
2. Inspect the Lockout switch to assure that it is functioning properly.
3. Reset and sequence the 7800. During standby or prepurge,
reassure the voltage between terminal 20 and G (ground). 220 -
240 Vac should be present. If not, the lockout switch may be
defective and need replacement.
4. If fault persists, replace the relay module.
Recommended Troubleshooting
18
(continued)