3-11
Failure description
Possible cause
Recommended action
During leak test, the alarm
of [
Auxi Ctrl Module
Error
] occurs.
The auxiliary control board is
faulty.
Replace the auxiliary control
board.
During leak test, the alarm
of [
Ventilator Hardware
Error 11
] occurs.
Safety valve control failure by
the auxiliary control board.
During leak test, the alarm
of [
Ventilator Hardware
Error 12
] occurs.
Safety valve control failure by
the main control board
Restart the machine. Verify if the
safety valve is controllable by
using the safety valve control
command of the monitor board.
If the safety valve is damaged,
replace the safety valve. If the
safety valve is in good condition,
it indicates that the auxiliary
control board or the main control
board is faulty regarding the
control path of the safety valve.
Check the connecting lines or
replace the faulty board.
NOTE
z
In case of leak test failure, check the machine for leakage and roughly assess the
amount of leakage by using the following methods.
Method 1: In the default VCV mode, stop fresh gas supply. If the folding bag rises
to the top each time, it indicates that the machine is not leaky. Otherwise, the
machine is leaky. Gradually increase fresh gas. The amount of fresh gas when the
bag rises to the top at each expiration can be roughly calculated as the amount of
leakage.
Method 2: During leak test, observe the airway pressure gauge. A period of time
(about 30 s) belongs to pressure holding stage after the airway pressure rises. If the
airway pressure gauge shows that airway pressure is gradually falling, it indicates
that the machine is leaky. Slowly increase fresh gas until airway pressure stops
falling. The amount of the then fresh gas can be calculated as amount of leakage.
z
If there is indeed a leak, check the pneumatic circuit system for leakage and
troubleshoot the problems as described in 5.3Pneumatic Circuit System Problems.
z
After leak failure is troubleshot, do the leak test again and make sure the test is
passed.
Summary of Contents for WATO EX-55
Page 1: ...WATO EX 55 65 Anesthesia Machine Service Manual ...
Page 2: ......
Page 4: ...II FOR YOUR NOTES ...
Page 6: ...IV FOR YOUR NOTES ...
Page 12: ...6 FOR YOUR NOTES ...
Page 58: ...3 22 FOR YOUR NOTES ...
Page 242: ...6 54 6 4 1 Electrical Connections Electrical Circuit Diagram ...
Page 260: ...6 72 FOR YOUR NOTES ...
Page 261: ...7 1 7 Parts 7 1 Main Unit 7 1 1 Main Unit 7 1 1 1 Exploded View ...
Page 321: ......
Page 322: ...P N 0621 20 78654 1 1 ...