47
P/N 240010943, Rev. C [09/07/2016]
_ _ _ _
_
Lockout Alarm A 0 0 Blocking too long e
rror
Enter Installer Menu, Boil
er
Status. Scr
oll
to
most recent
Lockout Alarm or Blocking Error. Di
agnose corrective action usi
ng
appropriate Trou
blesh
ooting Tree.
Unplug connector on supply
sensor
. Measure continuit
y of high
limit sensor (close/open signal) between two pins connected to two purple wires. Is continuit
y
av
ailable?
NO
YES
Is wire harness connected to both Gas V
alv
e and J13
connector on Control
Module?
NO
YES
Disconnect J13 connector on gas v
alv
e. Measure resistance
across top and bottom pins (1 & 5). Is resistance between
1.0 and 1.2 k
Ω
?
NO
YES
Disconnect harness from Gas V
alv
e. Does each
wire ha
ve continuit
y
between Gas V
alv
e and
Control Module
NO
YES
Is supply pipe heat
ex
changer hot?
NO
YES
Boiler has been dry
fired. S
ystem has too
much air
. Close manual
gas v
alv
e (shut off gas).
Purge air from system, wait for system to cool.
Replace Supply Sensor
Connect harness
Replace Control
Module
Replace Gas V
alv
e
Replace Harness
13 - TROUBLE SHOOTING
Содержание VX-399
Страница 50: ...50 P N 240010943 Rev C 09 07 2016 13 TROUBLE SHOOTING ...
Страница 62: ...62 P N 240010943 Rev C 09 07 2016 14 3 Connection Diagram 399 MBH 14 WIRING DIAGRAM ...
Страница 63: ...63 P N 240010943 Rev C 09 07 2016 14 4 Schematic Diagram of Ladder Form 399 MBH 14 WIRING DIAGRAM ...
Страница 81: ...81 P N 240010943 Rev C 09 07 2016 Company Address Phone Company Name Tech Initials Service Performed Date ...
Страница 82: ...DUNKIRK BOILERS 2201 Dwyer Avenue Utica NY 13501 web site www ecrinternational com ...