Huntleigh AlphaBed, Service Manual

Page: 80 / 94

WARNINGS:
DANGER OF ELECTRIC SHOCK. DO NOT TOUCH ANY EXPOSED PARTS
WHILE CONDUCTING THIS TEST. DO NOT TOUCH ANY PART OF YOUR
BODY WITH THE CONTACTS OF THE PROBES.
THIS EQUIPMENT SHOULD NOT BE USED IF YOU HAVE A HEARING AID
OR PACEMAKER FITTED, DUE TO THE POSSIBILITY OF
ELECTROMAGNETIC DISTURBANCE.
Specification : 3.0 kVac is applied between the connected Live and Neutral wires and the appliance’s
metal compressor assembly box. No breakdown should occur.
Note : The voltage levels used for this test, may stress and weaken the insulation. This test, is
therefore not recommended as a routine test. It should only be used after a major
assembly/disassembly has been completed.
3 PCB Functional Tests (Electrical Units Only)
Tests must be carried out using a 220-240 V, 50 Hz power supply.
Test Setup and Initial Switch On
3.1 Install the mating parts of the snap-lock connectors on the pump outlets so that both outlets are
open to atmosphere. Set the pressure control knob fully counterclockwise.
3.2 Connect the mains/power cable to a suitable power socket outlet and then set the run/standby
switch to ‘run’. All four indicator lights should illuminate and the audible alarm should sound for
about 3 seconds. The green ON indicator, the amber WAIT indicator and the LOW
PRESSURE indicator will remain on. The POWER FAIL indicator light should extinguish.
Power Fail Alarm Check
3.3 With the pump operating, disconnect the power supply at the power socket outlet then
reconnect it after 4 seconds. Verify that no alarms are given and normal operation is resumed.
3.4 Again disconnect the power supply at the power socket outlet. Verify that, after 5 seconds, the
red POWER FAIL indicator flashes in conjunction with the audible alarm. The WAIT indicator
should go off when the POWER FAIL alarm indicator flashes. Reconnect the power supply.
Verify that the POWER FAIL indicator is extinguished.
3.5 Operate the run/standby switch to ‘standby’ and verify that all indicators are off. After 5
seconds, operate the switch back to ‘run’. Verify that all alarm indications are cleared and
normal operation is resumed. Operate the run/standby switch to ‘standby’.
Low Pressure Alarm Check
3.6 Use suitable sealing caps to close the ports. Operate the run/standby switch to ‘run’. Verify
that, after 1 minute, the WAIT indicator is extinguished.
3.7 Open both ports to atmosphere. Verify that, after 4 minutes and 45 seconds, the red LOW
PRESSURE indicator flashes in conjunction with the audible alarm.
3.8 Operate the run/standby switch to ‘standby’ and back to ‘run’. Verify that all alarm indications
are cleared and normal operation is resumed.
Chap 5 Issue 2
Page 6 SER0004 Nov 2001
Testing Mini Pump Service Manual