Honeywell RM7824A Benutzerhandbuch
7800 SERIES RM7824A RELAY MODULE
65-0155—1
18
IMPORTANT
1. If the RM7824A fails to shut down on any of these
tests, take corrective action (refer to
Troubleshooting, RM7824A diagnostics and
return to the beginning of all Checkout tests).
Troubleshooting, RM7824A diagnostics and
return to the beginning of all Checkout tests).
2. When all Checkout tests have been completed,
reset all switches to original states.
TROUBLESHOOTING
RM7824A System Diagnostics
Troubleshooting control system equipment failures is easier
with the RM7824A self-diagnostics and first-out annunciation.
In addition to an isolated spst alarm relay (audible
annunciation), the RM7824A provides visual annunciation by
displaying the ALARM LED.
with the RM7824A self-diagnostics and first-out annunciation.
In addition to an isolated spst alarm relay (audible
annunciation), the RM7824A provides visual annunciation by
displaying the ALARM LED.
Self-diagnostics of the RM7824A enable it to detect and
annunciate both external and internal system problems.
External faults such as flame failures and false flame signals
are annunciated by a lockout of the RM7824A that energizes
the ALARM LEDs by using the optional Keyboard Display
Module or 7800 SERIES System Annunciation Diagnostics
and Troubleshooting, form 65-0118.
annunciate both external and internal system problems.
External faults such as flame failures and false flame signals
are annunciated by a lockout of the RM7824A that energizes
the ALARM LEDs by using the optional Keyboard Display
Module or 7800 SERIES System Annunciation Diagnostics
and Troubleshooting, form 65-0118.
The RM7824A provides diagnostic information to aid the
service mechanic to obtain information when troubleshooting
the system; see Table 7 and Table 8.
service mechanic to obtain information when troubleshooting
the system; see Table 7 and Table 8.
The optional Keyboard Display Module displays sequence
status messages indicating: INITIATE, STANDBY, SAFE-
START CHECK, PILOT IGN and RUN. The selectable
messages also provide visual indication, current status and
historical status of the equipment such as: Flame Signal, Total
Cycles, Total Hours, Fault History and Diagnostic Information.
status messages indicating: INITIATE, STANDBY, SAFE-
START CHECK, PILOT IGN and RUN. The selectable
messages also provide visual indication, current status and
historical status of the equipment such as: Flame Signal, Total
Cycles, Total Hours, Fault History and Diagnostic Information.
The Expanded Annunciator Terminal Status is not available
with the RM7824A. With this information, most problems can
be diagnosed without extensive trial and error testing.
Information available in the Diagnostic Information file
includes: Device Type, Device Suffix, Software Revision,
Manufacturing Code, Flame Amplifier Type, Flame Failure
Response Time, Selectable Jumper Configuration Status and
Terminal Status.
with the RM7824A. With this information, most problems can
be diagnosed without extensive trial and error testing.
Information available in the Diagnostic Information file
includes: Device Type, Device Suffix, Software Revision,
Manufacturing Code, Flame Amplifier Type, Flame Failure
Response Time, Selectable Jumper Configuration Status and
Terminal Status.
Diagnostic Information Index
The RM7824A with the optional Keyboard Display Module
can monitor input/output terminals and can display the status
of the terminal at the VFD (eg, Pilot Valve T9 ON<), see
S7800A Keyboard Display Module Specifications. A complete
terminal description and terminal number are provided. The
display will show the actual status of the terminal. If voltage is
detected at the terminal, ON is displayed; but if voltage is not
present at the terminal, OFF is displayed.
can monitor input/output terminals and can display the status
of the terminal at the VFD (eg, Pilot Valve T9 ON<), see
S7800A Keyboard Display Module Specifications. A complete
terminal description and terminal number are provided. The
display will show the actual status of the terminal. If voltage is
detected at the terminal, ON is displayed; but if voltage is not
present at the terminal, OFF is displayed.
Historical Information
The RM7824A has nonvolatile memory that allows the Relay
Module to retain historical information for the six most recent
lockouts. Each of the six lockout files retains the cycle when
the fault occurred, the hour of operation when the fault
occurred and the fault message and burner status when the
fault occurred. The historical information can be viewed by the
optional S7800A Keyboard Display Module.
Module to retain historical information for the six most recent
lockouts. Each of the six lockout files retains the cycle when
the fault occurred, the hour of operation when the fault
occurred and the fault message and burner status when the
fault occurred. The historical information can be viewed by the
optional S7800A Keyboard Display Module.
SERVICE NOTE:
To check voltages, remove the access slot
covers on the sides of the Q7800A,B.
covers on the sides of the Q7800A,B.
CAUTION
Reinstall access slot covers on the Q7800A,B
Subbase after performing voltage checks.
Subbase after performing voltage checks.