Honeywell RM7824A Product Data page 20

7800 SERIES RM7824A RELAY MODULE
Sequence
INITIATE HOLD The LED indicates the burner status, POWER, and that the internal timing functions are out of
(AC Frequency) synchronization. The burner sequence will not advance into STANDBY until the internal timing is
synchronized.
INITIATE HOLD The LED indicates the burner status, POWER, and that low DC Bus voltage has occurred. The burner
(Low Line Voltage) sequence will not advance into STANDBY until the DC Bus voltage is at a sufficient level for proper
operating parameters.
STANDBY The LED indicates the burner status, POWER. The burner can be placed in STANDBY by opening the
burner switch or if the operating controller indicates its setpoint has been satisfied. If a demand is
present for burner operation, the burner sequence will not advance from STANDBY to SAFE START
CHECK until the recycle limits close.
If the RM7824A is in a HOLD status, the following conditions could exist:
STANDBY HOLD: The LEDs indicate the burner status, POWER and FLAME, and that a flame is detected. A demand is
F/G (Flame Detected) present for burner operation. The burner sequence will not advance to SAFE START CHECK because a
flame is detected as being present. The sequence will not advance to SAFE START CHECK until the
flame signal clears. If the flame signal does not clear within 40 seconds, the RM7824A will lockout.
SAFE START CHECK The LED indicates the burner status, POWER, which is the period of time after STANDBY. The
RM7824A is verifying that a flame is not present before the start of Ignition Trials. If a flame is present,
the RM7824A will recycle to STANDBY.
PILOT IGN The LEDs indicate the burner status, POWER, PILOT and FLAME, which is the period of time the
RM7824Apermits the pilot valve and ignition to be energized and the pilot flame to be established.
RUN The LEDs indicate the burner status, POWER, PILOT, FLAME and MAIN, which is the period of time
after the Ignition Trials and before the operating controller setpoint is reached. During this time, the
burner is firing under the control of the operating controller.
RESET/ALARM TEST The LEDs indicate the burner status, POWER and ALARM. This condition indicates that the reset
pushbutton is pressed. If it is held for more than four seconds, the alarm output is energized. The alarm
output will be de-energized after the reset pushbutton is released.
Table 8. Hold And Fault Message Summary.
Fault Number
Fault 2 *AC Frequen/Noise*
Fault 3 *AC Line Dropout*
Fault 4 *AC Frequency*
Fault 5 *Low Line Voltage*
Fault 7 *Flame Amplifier*
Fault 8 *Flame Amp/Shutr*
Fault 9 *Flame Detected*
Fault 17 *Main Flame Fail*
Fault 19 *Main Flame Ign.*
Fault 24 *Call Service*
Fault 25 *Call Service*
Fault 28 *Pilot Flame Fail*
Fault 35-40 *Call Service*
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
65-0155—2 G.R. Rev. 07-03
Annunciation Message
Information
Fault Number Annunciation Message
Fault 41 *Main Valve On*
Fault 43 *Ignition On*
Fault 46 *Flame Amp Type*
Fault 47 *Jumpers Changed*
Fault 51 *Flame Too Strong*
Fault 52-70 *Call Service*
Fault 71-75 *Device Specific*
Fault 76-93 *Accessory Fault*
Fault 94-108 *Call Service*
Fault 110-111 *Call Service*
Fault 118-119 *Call Service*
Fault 123 *Call Service*
Fault 125-127 *Call Service*
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