Honeywell 7800 Series Manual page 48

RM7838B
TROUBLESHOOTING
TABLE 11—SELECTABLE MESSAGES (SEE TABLE 4) (Continued)
Selectable Message/
Display
Flame Response
Purge Time
Mfg Code
SW Rev.
Expanded Annunciator
Remote Command
LOCKOUT MESSAGES (Table 12)
When RM7838B has locked out, it displays a repeating
cycle of messages. There are four states in the cycle:
1. STATE 1 (Fig. 31): First state message display lasts
six seconds. First line displays the word LOCKOUT fol-
lowed by the fault code number, and possibly a lower case
letter if an Expanded Annunciator is connected. The status of
the Relay Module at the time of lockout is shown on the right
side of the first line as either INITIAT, STANDBY, PURGE,
PFEP, MFEP, or RUN. The lockout reason corresponding to
the fault code number is displayed on the second line,
highlighted by asterisks on each side. If the lockout reason is
being enhanced due to the presence of an Expanded Annun-
ciator, a lower case letter, represented by x below, will appear
next to the fault number. This letter corresponds to the first-
out code supplied by the Expanded Annunciator.
2. STATE 2 (Fig. 32): Second state message display lasts
two seconds. The message consists of the English text.
3. STATE 3 (see Fig. 33): Third state display message
lasts three seconds. It is a replica of the burner status as it
existed at the time of lockout. The second line will be blank
if the burner status at the time of lockout did not include a pre-
emptive message (in parentheses) for the second line.
65-0120—1
Description
Amplifier Flame
Failure Response
Time (FFRT) in
seconds.
Timing value
of purge card.
Manufacturing code
is five digit number
representing
date code.
Software revision
and version code
for RM7838B
and Keyboard
Display Module.
First level prompt for
history information.
Has subset level.
See Table 5 or 10.
Status of firing
rate command
from remote
controller.
Fig. 31—Lockout message state 1.
4. STATE 4: Both lines are blanked for one-half second,
then cycling resumes back to the first state.
48
Possible States/Range
(Terminals) Comments
3s/.8
mm:ss Two seconds to
30 minutes
nnnn
nnnn/nnnn First four numbers are
the VFD software;
second four numbers
are the RM7838 software.
NONE/HOLD
HF/LF
SAVE
M1991B