60-2035—9
10
RA890G
TROUBLESHOOTING
1) Normal voltage—check valve and valve circuit.
2) Zero voltage—clean relay contacts. Replace the
RA890 if this does not correct problem.
14. Observe ignition for cutoff when flame relay pulls in if
connected to terminal 4.
a. If ignition stays on and wiring checks out, replace the
RA890.
MISCELLANEOUS PROBLEMS
Relay Chatter
Load relay chatter may result from extreme low voltage
(notify power company) or from a loose connection (tighten).
Flame relay chatter may result from improper combus-
tion (adjust burner), or soot or carbon on flame detector
(clean and correct the cause).
REPEATED LOCKOUTS OR CONTROL
FAILURES
The most common causes of repeated failure of this
control or flame detector or of repeated lockouts are:
a. High ambient temperatures—over 125
°
F (52
°
C).
b. Supply voltage variation greater than +10 to -15 percent.
c. Electrical overloading of the contacts.
d. Marginal flame current.
e. Frequent cycling with high ambient temperatures.
Summary of Contents for RA890G
Page 11: ...11 60 2035 9 ...
