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CT 9000? ADV
Fault # 005
Safe relay would not turn off
Occurs when:
During Power-up testing, relay K2 on the Mother
board is monitored by the CPU to ensure that it turn off. U6 pin 9 is
set low by the CPU and U6 pin 10 is kept low due to the CPU not
toggling U14 pin 12. If a problem exists to cause the output to
toggle incorrectly, the CPU will display the Fault message at the
end of Power-up testing.
Corrective action: Check chips U14, U6, U15 and Relay K2 on the
Mother board.
Fault # 006
Safe relay would not turn on
Occurs when:
During Power-up testing, relay K2 on the Mother
board is monitored by the CPU to ensure that it toggles accurately
according to the inputs of U6 pin 9 and pin 10. If a problem exists to
cause the output to toggle incorrectly, the CPU will display the Fault
message at the end of Power-up testing.
Corrective action: Check chips U14, U6, U15 and Relay K2 on the
Mother board.
Fault # 009
Safe relay turned on with no failsafe
Occurs when:
During Power-up testing, the safe relay failsafe is
tested to ensure that it is not stuck in an unsafe state. U6 pin 9 is
set high by the CPU but the failsafe (U14 pin 12) is not toggled. If
the safe relay turns off the CPU, the CPU will display the Fault
message at the end of Power-up testing.
Corrective action: Check chips U14, U6, U15 and Relay K2 on the
Mother board.
Fault # 010
PWM stop turned off with no failsafe
Occurs when: During Power-up testing, the PWM STP STATUS
line (U5 pin 3) is checked to ensure that the PWM controller, U16,
is not active unless the failsafe is toggled. U6 pin 1 is toggled low,
causing U5 pin 2 to be low. The failsafe is not toggled, so U5 pin 1
should also be low If the output of U5 pin 3 is not high, the CPU will
display the Fault message at the end of the Power-up testing.
Corrective action: Check chips U5, U6 and U14 on the Mother
board.
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