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7800 SERIES S7800A KEYBOARD DISPLAY MODULE
Table 6. Accessing Historical and Diagnostic Selectable Messages.
Step
Operation
1.
Press SCROLL key to access
Diagnostic Information.
2.
Press Change Level key to
Access Diagnostic Information.
3.
Continue display of Diagnostic
Information.
4.
Continue through remaining
Diagnostic Information display
following step 3 as required.
5.
Press the Change Level key to
return to the first level of
Diagnostic Information data
prompt or to other selectable
messages.
SERVICE NOTE: If the Keyboard Display Module screen is
scrambled, remove and reinstall the Keyboard
Display Module and reset the 7800 SERIES Relay
Module.
SERVICE NOTE: Reset the 7800 SERIES Relay Module by
pressing the reset pushbutton on the relay module or
pressing a remote reset pushbutton wired through
the Keyboard Display Module, Data ControlBus™
Module or Remote Reset Module. A power-up reset
will cause an electrical reset of the 7800 SERIES
Relay Module but will not reset a lockout condition.
Lockout Messages
When the 7800 SERIES is locked out, it displays a repeating
cycle of messages. See Table 8. There are four states in the
cycle:
1. State 1 (Fig. 13). A 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 letter corresponds to the first-out code supplied by
the Expanded Annunciator. The lockout reason corre-
sponding to the fault code number is displayed on the
second line, highlighted by asterisks on each side.
Fig. 13. Lockout message, State 1.
65-0090—4
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Press
Display
( )
STANDBY
Diagnostic Info>
(↔)
STANDBY
Diagnostic Info>
( )
STANDBY ! DI
Device RM7800<
—
—
(↔)
STANDBY
Diagnostic Info>
SAVE
M1991C
14
Use the Down/Up SCROLL keys to access
the selectable message. The second line
will display Diagnostic Information.
Use the Change Level key to access the
Diagnostic Information.
Push the ( ) SCROLL key to scroll to the
next Diagnostic Message.
—
Another display can be selected or
discontinue accessing Diagnostic
Information review.
2. State 2 (Fig. 14). Display of the second state message
lasts two seconds.
Fig. 14. Lockout message, State 2.
3. State 3 (Fig. 15). Display of the third state message
lasts three seconds. It is a replica of the burner status
as it existed at the time of the lockout. The second line
is blank if the burner status at the time of lockout did not
include a preemptive message (in parentheses) for the
second line.
Fig. 15. Lockout message, State 3.
Comments
SAVE
M1992A
SAVE
M1993C
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