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Monitor GF1800 - Page 59

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I
SYMPTOM
| |
CHECK1
| |
RESULT
| |
CHECK2
| |
RESULT
| |
CHECKS
| |
RESULT
| |
CHECK4
| |
RESULT
| |
CHECKS
\ \
RESULT
| |
REASON
| |
CORRECTIVE
MEASURJT]
Failure
o!
microprocessor.
(IC1)
Failure
of
transistor
airey.(1C13)
Failure
of
diode
(D5-O8,
D30.
031)
Failure
of
relay-
(RL3.
RL4)
I
Failure
of
transistcr.(Q3)
Incorrect
wiring
of gas
solenoid
vah/e.
Gas
sctenid
valve open.
Correct wiring-
Replace
gas
solenoid
valve.
Failure
of
transformer.
Failure
of
microprocessor.(!C1)
Failure
of
operational
amplifier.
(IC9)
Failure
of
diode.
(D25,
D26)
Failure
of
transistor.
(Q2,
CM)
Failure
of
resistor.
(FO5—R38)
Failure
of
capacitor.
(C25-C27)
Incorrect
wiring
of gas
control
valve.
Correct
wiring.
Gas
control
valve
open.
M
Replace
gas
control
valve.
Contact
gas
supplier.

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