Honeywell S8610U Quick Reference Manual page 2

Table 3. Green LED Status Codes.
Green LED
a
Flash Code Indicates Next System Action
OFF No "Call for Heat" Not applicable
Flash Fast Power up - internal check Not applicable
Heartbeat Normal startup - ignition Not applicable
sequence started (including
prepurge)
4 Seconds ON Device in run mode. "x" = Not applicable
then "x" flashes flame current to the nearest
μA.
2 5 minute Retry Delay Initiate new trial for ignition after retry delay
– Pilot flame not detected completed.
during trial for ignition
3 Recycle Initiate new trial for ignition. Flash code will
– Flame failed during run remain through the ignition trial until flame is
proved.
4 Flame sensed out of If situation self corrects within 10 seconds,
sequence control module returns to normal sequence. If
flame out of sequence remains longer than 10
seconds, control will resume normal operation 1
hour after error is corrected.
5 Damper Error: If damper error corrects, ignition control
– Damper required but not resumes normal operation.
present
– Damper failed to open
within 60 seconds
– Damper failed to close
within 60 seconds
6 Control Internal Error Control module remains in wait mode. When the
fault corrects, control module resumes normal
operation.
7 Flame rod shorted to ground Control module remains in wait mode. When the
fault corrects, control module resumes normal
operation.
8 Low secondary voltage Control module remains in wait mode. When the
supply fault corrects, control module resumes normal
operation.
a Flash Code Descriptions:
- Flash Fast: rapid blinking.
- Heartbeat: Constant ½-second bright, ½-second dim cycles.
- 4-second solid on pulse followed by "x" 1-second flashes indicates
flame current to the nearest mA. This is only available in run mode.
- A single flash code number signifies that the LED flashes X times at 2
Hz, remains off for two seconds, and then repeats the sequence.
69-2042—01 6
Recommended Service Action
None
None
None
None
If system fails to light on next trial for ignition check gas supply,
pilot burner, spark and flame sense wiring, flame rod
contaminated or out of position, burner ground connection.
If system fails to light on next trial for ignition, check gas supply,
pilot burner, flame sense wiring, contamination of flame rod,
burner ground connection.
Check for pilot flame. Replace gas valve if pilot flame present. If
no pilot flame, cycle "Call for Heat." If error repeats, replace
control.
Check damper connection, damper wiring, and 24V connection
on control.
Replace damper if necessary.
Cycle "Call for Heat." If error repeats, replace control.
Check flame sense lead wire for damage or shorting. Check
that flame rod is in proper position. Check flame rod ceramic for
cracks, damage or tracking.
Check transformer and AC line for proper input voltage to the
control. Check with full system load on the transformer.
69-2042—01 7
PRE TRIAL
P1 + FOR
PURGE
IGNITION
30 SEC 15 SEC J1
FLAME
CURRENT
0 SEC 90 SEC
–
STATUS
TRIAL
P1 + PRE
FOR
PURGE
IGNITION
30 SEC 15 SEC
FLAME
CURRENT
0 SEC 90 SEC
–
STATUS
Fig. 5. Measuring flame current with micro-ammeter.
69-2042—01 8
DC
002.3
µA
J1
M31283
69-2042—01 9
FLAME CURRENT MEASUREMENT
Flame current of the device can be meaured using a standard
micro-ammeter by simply inserting the meter probes into the
holes labeled FLAME CURRENT, as shown in Fig. 5.
• Flame current must be measured with pilot valve lit but no
main gas flowing.
• Disconnect MV leadwire from the control before measuring
flame current.
Set meter to DC μAmp scale.
•
• Ensure meter leads are positioned correctly [+/-].
NOTE: Trying to measure the pilot flame current in series with
the wiring will not be accurate.
Recommended Minimum Pilot Only Flame Current:
Must read steady 1 μAmp DC minimum.
•
Flame current should be 2 μAmp or greater for reliable
•
appliance operation.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
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© 2010 Honeywell International Inc.
69-2042—01 M.S. Rev. 09-10
Printed in U.S.A.