Note:
The labeling of P507 test points located on the Backplane board are
for reference in this illustration and do not appear on the Backplane
board.
Valves Test
1. Power on the PCS2 into the Utilities mode of operation by pressing
and holding the PLASMA key during power up until the Utilities
menu appears.
2. Select Diagnostics on the Utilities menu by pressing the MODIFY
PROGRAM key until the arrow points to Diagnostics, then press the
DRAW key.
3. Select the Valves test by using the MODIFY PROGRAM key to move
the arrow to “Valves” test and the DRAW key to execute.
4. Open all three valves by pressing the SALINE, PLASMA, and CUFF
keys.
5. Insert tubing from a PCS2 harness set, LN 620, into each valve and
press the DRAW key to start cycling the valves.
6. Allow valves to cycle for at least one minute, then press the STOP
key. Verify that at the end of one minute, no errors have accumulated
in the error log. If errors exist, determine which valve is causing the
error by running the cycle test again. Isolate problem to power
(Eng./De-eng.) position switch (Open/Closed), or valve current (High-
current). Refer to Chapter 6, Troubleshooting.
7. Exit the Valves test by pressing the MODIFY PROGRAM key.
Valve Occlusion Test
1. Select Diagnostics on the Utilities menu by pressing the MODIFY
PROGRAM key until the arrow points to Diagnostics, then press the
DRAW key.
2. Select the Valves test by using the MODIFY PROGRAM key to move
the arrow to the “Valves” test and press the DRAW key to execute.
3. Open all three valves by pressing the SALINE, PLASMA, and CUFF
keys.
4. Install a length of the harness tubing through the open Saline pinch
valve (white) and attach one end to a sphygmomanometer.
Note:
When performing the pinch valve occlusion test, it is important to
ensure that the test harness setup does not contain any leaks that
might indicate false occlusion results. This can be verified by
attaching the sphygmomanometer to the harness tubing and
clamping the opposite end of the tubing. Pressurize the
sphygmomanometer to 200 mmHg and verify that there is no
leakage evidenced by a decrease in pressure.
3-4
PCS2 Service Manual
