Cocoon CWS 4000 - Page 12

Care Essentials CWS4000 Cocoon Warming System Service Manual
STEP PROCEDURE
1 If you have not already done so, read the CWS4000 Instruction Manual and Service Manual. Read
all of this procedure.
2 e Place the CWS4000 on a firm, level surface.
e Do not connect the PVC delivery hose to a warming blanket.
e Disconnect the CWS4000 from mains power.
3 e Locate the enclosure rear with the warning label.
e Locate the small black cable socket on the top left of the enclosure rear.
e Insert the cable plug into the socket. It should snap into place.
e Insert the cable D-connector into a free Com port connector on the PC.
4 Place the digital thermometer sensor in the centre of the delivery hose outlet as shown in Figure 6
above.
5 e Connect the CWS4000 to mains power.
e Select the 46°C temperature setting.
e Operate the CWS4000 on the 46°C temperature setting for at least 10 minutes prior to
commencing the thermostat test.
6 While the CWS4000 is “warming up”, start the Terminal program on the PC and select the settings
as follows:
e Select the Com port connected to the Converter cable in Step 4 above.
e Baud rate — 9600, data bits — 8, parity — none, flow control — none.
e Terminal emulation — VT100, character set — ASCII.
e Append line feeds to incoming line ends — enabled.
7 Follow the instructions shown on the Terminal window:
e When a correct connection is established between the CWS4000 and the PC, a dot (.) is
received every second.
e Press the spacebar to display the root screen.
e Press “T” to display the over-temperature thermostat test screen.
e The 46°C temperature setting must be selected in order for the test to proceed.
e To initiate the over-temperature thermostat test, SLOWLY type, “YES” then press the Enter key.
To stop the test, press any key or change the CWS4000 temperature setting.
e The CWS4000 is deemed to have passed the test if a thermostat trips in under eight (8)
minutes.
e Confirm that the thermostat resets after several minutes, restoring power to the CWS4000.
8 e Disconnect the CWS4000 from mains power.
e Disconnect the cable from the CWS4000 and PC.
9 Confirm that the CWS4000 functions correctly by undertaking a performance inspection as detailed
in Section 4.3 above.
Revision | 13 June 2006 Page 11