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Monitor GF1800 - General Checks

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GENERAL
CHECKS
Is
power
available
in
wall outlet?
Is
power Plug
inserted
in
wall
outlet?
Has
there
been
a
power
intemjpdon?
(Display
window shows
88:88)
Has
Circulation
Fan
stopped?
Is
Manual
Gas
Valve
'open*
?
Is
Operation
Switch
on?
Is
operation
mode
on
Manual?
Is
set
temperature
higher
than
room
tamperature?
Is
child
lock
feature
engaged
(disengaged)?
REASON
CORRECTIVE
MEASURE
P~
DoeiConilJuilluci
Blower
motor
operate?
M
No
1—
ls
wiring
-pj
Yes
1-1
1
'
correct?
' '
'
'
-1
No.
1—
-
mmm
r
L
-
.
ai
e
cu
Incorrect
wiring
of
Flame
sensor
or
Ground.
Flame
sensor
rod
touches
to
burner
parts.
Failure
of Gas
Control
Valve.
Failure
of
Automatic
Gas
Valve.
!
Failure
of
Combustion Blower
motor.
Failure
of
Circuit Board.
Incorrect
or
disconnected wiring.
VMV
-
-
~
-
Redac
C
'
Boar
Correct wiring.
Correct
or
Change.
Turn
VR
2-
on
PCB
clockwise
1/8
turn
and
check pressures.
1
Check
for Air
blockage.
Replace
Air
Pressure
Switch.
[
Replace
Automatic
Gas
Valve
Unit.
Replace
Automatic
Gas
Valve
Unit.
[
Replace
Combustion
Blower
Motor.
Replace
or
check Circuit Board.
Correct
wilting.
•4
Failure
of
Ignition
Transformer.
I
'
••
Replace
Ignition
Transformer.
j
1
1
Failure
of
Circuit Board.
1
1
Replace
or
check Circuit Board.
—4
Incorrect
wiring.
1
I
Correct wiring.
^
There
is not
1
1
0V
at
plug.
Failure
of
Circuit
Board.
Failure
of
Ignition
Transformer
relay
on
PCB. Replace PCB.
Replace
or
check
Circuit
Board.
i
Fuse
open.
Change
fuse.
J
-I
Short
circuit
of
lead wire.
I I
Correct
or
change.
I
•-
Failure
of
Circuit
Board.
Replace
or
check
Circuit
Board.
Is
in
Auto operation mode.
I
1
Put
in
Manual-Bum
Mode.

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