Honeywell R4140G Installation Instructions Manual page 20

R4140G, L AND M FLAME SAFEGUARD PROGRAMMING CONTROLS
Symptom
A. On a call for heat,
programmer will not start.
(Relay 1K does not pull in.)
Continued.
B. Relay 1K pulls in, but
burner motor does not start.
C. Programmer starts, but
system shuts down after a few
seconds; ignition does not
occur, and programmer
recycles to standby position
(zero seconds); R41401 locks
out.
D. Programmer stops during
prepurge and does not
continue sequence.
60-0770—2
Table 5. Troubleshooting Chart (Continued) .
Test
4. Open master switch, remove programmer
from subbase, close master switch, and
check for line voltage between the
following terminals on the subbase:
a. L1 to L2.
b. (1) Model with preignition interlocks—
4 to L2.
(2) Model with start interlocks—16-L2
(or connection between burner
controller and start interlocks when
terminal 16 is not used as a tie
point).
c. (1) Model with preignition interlocks—
16-L2.
(2) Model with start interlocks—4-L2.
CAUTION
Replace all external devices not operating properly. Do not bypass external devices.
5. Open master switch, reinstall programmer
on subbase, and close master switch.
1. Check manual switch for burner motor.
2. Check external burner motor circuits.
3. Check motor power supply, motor overload
protection, and motor starter
4. Check burner motor.
1. Check relay 2K.
2. Check that all limits and interlocks are
closed. (Start interlocks must stay closed
until Airflow switch closes.)
3. Check that the Airflow switch contacts are
closed.
1. For an R4140G or M, proceed to step 3.
On an R4140L only, check that the external
High Fire switch is closed; if it is, proceed
to step 2.
2. On an R4140L only, check purge extender,
if provided, otherwise proceed to step 3.
3. Check Timer switch.
Possible Cause/Correction
4. If there is no voltage, check that:
a Line voltage power is connected to
master switch; master switch is closed;
and overload protection (fuse, circuit
breaker, or similar device) has not
opened power line.
b. Limits and burner controller contacts
are closed. If a limit is open, determine
cause(s) and correct condition(s) before
proceeding.
c. Interlocks are closed. If one is open,
determine cause(s) and correct
condition(s) before proceeding. (On
model with start interlocks, if interlocks
are not used, jumper must be installed
between terminal 4 and the burner
controller.)
5. If relay 1K still does not pull in, replace
programmer.
1. Make sure switch is closed.
2. Make sure circuits are wired correctly;
replace deteriorated leadwires.
3. Replace devices if not operating properly.
4. Replace burner motor if it is not operating
properly.
1. If relay 2K has pulled in, perform the Flame
Relay (2K) Hold-In Check immediately
following this table.
2. If a limit or interlock is open, determine
cause(s) and correct condition(s).
3. Make sure that there is airflow; if not:
a. Check burner motor; replace if
necessary.
b. Check Airflow switch; replace if
necessary.
1. If switch is open:
a. Check High Fire switch; replace if
necessary.
b. Check firing rate motor and
transformer; replace if necessary.
2. Make sure purge extended jumper is
plugged in.
3. Make sure Timer switch is in NORM
position.
20
(Continued)