68 Direct-Fired Make-up Air • MUA-SVX01A-EN
Trouble Shooting
Run Period a. No flame present.
b. Airflow lockout feature is enabled and the airflow switch opens.
c. Interrupted pilot valve terminal is energized (RM7895C/
D,EC7895C, RM7896C/D).
d. Main valve terminal is not energized.
e. Delayed (second stage) main valve terminal is not energized
(RM7895C/D,EC7895C, RM7896C/D).
f. Internal system fault occurred.
g. Purge card is removed.
h. Purge card is bad.
Table 14. Trouble shooting guide for flame relays (continued)
flame relays
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