Assistant Service
Manual
OPTIKON 2000
Code 121008S
8-3 Rev. D
generated. This could be due to a defective component in the 347888
power supply circuit.
•
Err 26: Diath enable/reading failure,
Err 27: Diathermy enable failure
The ASSISTANT tests its capability to start/stop diathermy emission
both with the standard software enable/disable and with the safety
hardware disable. If a malfunction is found Err26 or Err27 are
generated. This could be due to a malfunction of the 347888 or to a
missing connection between J10 of the Control board and J5 of the
U/S and Diathermy driver.
•
Err 24: US enable/reading failure,
Err 25: US enable failure
The ASSISTANT tests its capability to start/stop Ultrasound emission
both with the standard software enable/disable and with the safety
hardware disable. If a malfunction is found Err24 or Err25 are
generated. This could be due to a malfunction of the 347888 or to a
missing connection between J10 of the Control board and J5 of the
U/S and Diathermy driver.
•
Err 09: Air pressure
The equipment compares preset sterile air injection pressure against
actual pressure. When a mismatch is found, Err09 is generated. This
could be due to a bent tube in the injection air circuit inside the
equipment, to a severe leakage in the air circuit/tank, to a broken air
pump/motor or to a malfunction in the air pressure sensor or in the
motor drive circuit.
•
Err 23: Air enable failure
The sterile air injection pump performs a redundad safety switch (Q2
of 391120). The correct functioning of this transistor is tested at each
power-on: Q2 keeps the pump circuit open while U2 and Q1 change
the supply voltage at the other contact of the pump motor. If Q2 is
working correctly, the motor should not rotate and, therefore, the
actual pressure should not change. Otherwise, Err 23 is delivered. If
the motor does not rotate but the error is delivered anyhow, try to
replace U2.
•
Err 29: Watchdog failure
A watchdog circuitry protects the patient against microprocessor looks.
The circuitry puts all the outputs in a safe state in case of
microprocessor malfunction. The watchdog is tested at each power-on.
If it does not respond correctly, the system is halted and the Err 29
message is delivered.
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