Ibc; Ibc Indkator Lights; Lockout Modes - Weil-McLain GV90+ Installation And Start-Up Manual

GV90+ Series 2
GAS·FIRED WATER BOILER -
Boiler Manual
Troubleshooting
(continued)
Figure 92 GV90+
Integrated Boiler Cootrol (IBC)
Control Indicator lights -
IBC (Integrated boller control)
Make sure ground wtrtng is installed per wiring
diagram. Good grounding is extrtmtly important for
proprr operarion.
IAWARNINGI
Solder or wattr splatttT betwet-n plugs
and circuit board can cause improper
operation of IBC. Place a shield over the
boiler internal controls and components
duri:ng installation. Failure to comply
could result in
severe
perSonal injury,
deat:h or substantial property damage.
IBC lndlcat:or lights - lockout
modes
S.. Clum
I lhtougll
7 lo
thi$
se<tloo for d~llliiM
rrouble-shooting procedures.
To reser conrrol
aft~r
a lockout, rum off power at
rhe 120 VAC
Stel'Vic~
swirch or turn down all ther-
mostats. Wait 45 seconds. Then
restor~ ~r and
call fo r hear.
Afre:r an ovtr-temptrature lockout (POWER and
UMIT lights fflashlng), the control will only reset
after interruption of 120 VAC for 45
seconds.
(And
rempentu r~
at return ware:r temptraturt sensor
must be below 240'F.)
Part number 550-1+2-783/1012
HARD LOCKOUT Summary (Flashing LED's)
MAY
remove
120VAC
power for more than
2
seconds
to clear
lockout
OR
ignition control will automatically restart sequence of operation after 1 hour
waiting period after fautli condition is cleared.
INDICATOR UGHT CONDmON
POWER
Rashes once per secooo
Flash code 2"
Rash
code
3•
Aash
code
4•
A ash
code
s•
Flash
code 6"
120 VAC
connection to boiler
reversed.
Internal fault, microprocessor
or
memory.
Unused.
Unused.
Internal fault, water thermistors
tisagee.
Internal fault, gas valve circuit.
'Flash
code pattern:
POWER LED nashes 2, 3,
etc.
times
rapic!ly fol-
lowed
by
2 seconds
off,
then repeats.
POWER light flashing alone
Usually indicates reversed polarity of 120 VAC power wires.
POWER andTSTAT/CIRC lighu flashing
Usually indicates srray volrage on
at~mal
thermostat circuit wires or
return warer tempernture enrtring boiler sections has not rt:ached I
)()Of
within 30 minures.
POWER and PRESS SWITCH lighu flashing
Usually indicates pressure switch is closed when it should not be, or
pressure swirch failed to dose within 5 minures of blower starting.
POWER and FLAME lights flashing
Usually indicates control has had three unsuccessful ignition attempts
orsensed flame when It shouldn't be there. Boller may not
be
properly
grounded.
IBC Indicator lights -
non-lockout modes
TSTAT..CIRC light flashing alone
Usually
indicat~
rt:turn water
temperarur~
smsor detects water at boiler
return pipe less than 400F. Both internaJ circulators will run continu-
ously,"' ' '" with no eall for heat, until
ttmperatul'!'
rim .
LIMIT light flashing alone
Usually indicates an open or shorted return
wat~r
or supply tempera-
ture ktlSOr.
Troubleshooting the IBC
~
Figure 93>
pag~
80 fo r location of harness plug rtctpt:ades and
plugs on the IBC.
79