Park House Healthcare PHASE II User manual

PHASE II
Mattress Replacement System
Service Manual

Index
Page 1: Product introduction
Page 2: Operating instructions
Page 3: Pump assembly photograph
Page 4: Left hand mains end cap photograph
Page 5: Right hand end cap photograph
Page 6: Removing the back plate assembly
Page 7: Compressor replacement
Pressure control valve replacement
Manifold replacement
Page 8: Basic logo! operating sequence
Page 9: Replacing the pressure sensor
Replacing logo modules
The power supply unit
Page 10: Logo! expansion unit replacement
Page 11: PCB photograph
Page 12: Removal of mains fail/low pressure alarm PCB
Page 13: Wiring harness replacement
Page 14: Replacing control panel membrane
Page 15: Bed hook assembly photograph
Bed hook removal
Page 16: PHP 596 phase II pump troubleshooting
Page 17: Drawing 002 (Logo! logic control unit)
Page 18: Drawing 003 (Logo! logic expansion unit)
Page 19: Drawing 004 (Logo! logic power supply unit)
Page 20: Drawing 005 (compressor)
Page 21: Drawing 006 (pressure control valves)
Page 22: Drawing 007 (pressure sensor)
Page 23: Drawing 008 (PCB for phase II)
Page 24: Drawing 009 (pneumatic end cap fitting)
Page 25: Drawing 010 (wiring assembly)
Page 26: Product codes and descriptions
Page 27: Technical data

PART 1; PRODUCT INTRODUCTION
General Function and Component Details
1ABOUT THE PHP 596
The PA7500 offers a comfortable support, whose cells gently inflate and deflate (in
accordance with established alternating principles). It is cost effective for both the prevention
and treatment of pressure ulcers. The Phase II power unit operates a 10-minute alternating
cycle, and is both energy efficient and quiet in operation. In the event of cardiac arrest the
CPR can be released allowing the system to be deflated in 10 seconds or less.
2TECHNICAL DESCRIPTIONS
The PA7500 is comprised of a pressure regulated pump and an air flotation mattress system
The pump is constructed from a metal alloy case with abs endcaps and meets the following
safety standards.
Type B
Medical Equipment-Air Pump
With respect to electric shock,
Fire and mechanical hazards only
In accordance with UL2601-1
CAN/CSA C22.2 No.601.1
Class 1 equipment
IT FEATURES
1. Mains on/off switch with indicator light
2. Mains live and neutral circuit breakers
3. Three push button comfort control with led indicators
4. Static push button with led indicator
5. Low pressure audible alarm with led indicator
6. Mains fail audible alarm with reset push button
3. COMFORT CONTROL
Different ranges adjustable to patient's comfort while maintaining low tissue interface
pressure.
Internal pressure of the mattress is ranged from 30-80 mm/Hg +/-10%
4. Static control
The static function overrides the alternating cycle for 20 minutes
5. Mains Failure alarm
Audible alarm will activate at any time that the mains supply is removed or switched off.
Page 1

OPERATING INSTRUCTIONS
1. Place the pump on a flat surface or suspend the pump unit by its hooks at
the end of the bed.
2. Place the air mattress over the bed making sure it is extended completely
without any kinks. Place with the printed feet at the bottom of the bed
3. Connect the air hoses from the mattress with the air outlet connectors on
the pump unit. These are CPC quick release connectors. Make sure you
hear them click when connecting.
4. Plug in the AC power cord to the AC outlet (Be sure the switch is in the
off position before plugging in)
5. Plug in and turn on power
6. The led on the medium position will be illuminated and all mattress cells
will inflate after which the alternating sequence will automatically
commence.
7. Comfort pressure is adjusted by pressing the light, medium or heavy
control positions.
Page2

Phase 2 Pump Component Assembly
Mains fail / low pressure alarm pcb
Logo power supply unit
Varistor logo logic expansion unit
logo logic control unit
Pressure sensor
Compressor
Non return valves output feed pipes
Pressure control valves
Page3

Phase 2 left hand endcap (mains in)
Illuminated mains rocker switch
Earth connector
Circuit breakers, live & neutral
Page4

Phase 2 right hand endcap (mattress feed)
Mains fail reset button
Male & Female cpc connectors
Page5

Removing the backplate assembly from the case
Note: ensure the pump is disconnected from the mains supply
1. Remove the four allen bolts from each endcap.
2. In the lefthand endcap remove the live and neutral leads to the mains switch
from the logo power supply separate the male and female bullet terminals
connecting the ground cable to the chassis.
3. In the right hand endcap, remove the white connector (s1) from the PCB which
is connected to the mains failure reset button.
4. Detach the silicon pressure feed pipes from the two cpc connectors.
5. Remove the four securing bolts which fix the assembly backplate to the case,
there are two bolts in each side.
6. Slide the chassis to the right hand side of the case. When one third removed,
disconnect the 12 way control panel connector from the PCB. (j2)
7. Continue to slide out the backplate completely. Use the instructions in reverse
order to re-assemble.
Page6

Compressor replacement
(Photograph page3)
Ensure the component assembly backplate is completely isolated from the mains
supply.
The compressor operates on 230 volts ac and, therefore, it is essential the backplate is
disconnected from the power source.
Remove the pressure feed pipe from the red outlet on the compressor to the
valve/manifold assembly. (refer to drawing 009).
Unscrew the neutral terminal on the power supply unit, top left and remove the live
feed to the compressor from terminal Q3/2 on the logo! Main logic controller. (refer to
drawing 010).
Snip the appropriate zip ties to remove the compressor leads.
Unfasten the fixing nuts and bolts to release the compressor and mounting bracket from
the backplate. Remove the whole compressor assembly away from the backplate.
Simply pull each rubber mounting post from each locating hole in the bracket.
Taking the replacement compressor, cut and trim each lead to the same lengths as the
original compressor. Snip the short blue neutral lead (which connects to the mains
switch) away from the original compressor.
Using new ferrules fit and crimp to the new compressor remembering to reconnect the
short blue neutral lead.
Mount the compressor onto the bracket by simply pulling through each rubber
mounting post trough the corresponding holes.
Before finally fixing the compressor and bracket back in place on the backplate, reroute
the leads back into their correct locations and connect to the respective terminals.
Fix to the backplate using the nuts and bolts. Reconnect the silicon pressure feed pipe.
Pressure control valve replacement
(photograph page 3)
To replace either of the control valves, firstly remove the electrical connector with the
yellow led indicator. Simply remove the single fixing screw and pull the connector
away.
There are only two fixing screws connecting the valve to the manifold. With the valve
removed, ensure the rubber seal is fitted correctly between the manifold and the valve.
Refit the replacement valve as above in reverse order.
Manifold replacement
(photograph page 3)
Remove both valves as explained above. The power feed terminals can be left in place
attached to the valves.
Make a note of the three silicon tubes and then remove from the manifold. Unfasten the
manifold from the backplate by removing the two nuts and bolts.
Replace the manifold and assemble the unit by following the above instructions in
reverse order. (refer to drawing 006).
Page 7

Basic logo operating sequence
Warning! Only suitably qualified personnel should work on live equipment under test
conditions.
To test the operating status of the logo! Components it is necessary to reconnect the
mains end cap to the logo! Power supply unit whilst the assembly backplate is out of
the case. Ensure the earth cable is reconnected. To the left hand side of the logic
controller and the expansion unit, there is a small indicator alongside which is the
legend RUN/STOP.
When the unit is switched on, these indicators will immediately show red and after a
few seconds turn green. With green showing , then the hardware and software
programme are operating correctly.
Should the indicators not light at all, then the power supply unit should be tested.
In normal operating mode with a green indication on the logic controller but a red or
amber on the expansion unit, then this would suggest a faulty expansion unit.
If the RUN/STOP indicator is red or amber on the logic controller then assistance
should be obtained from Parkhouse healthcare technical department.
The logo logic controller cannot be replaced without the assistance of Parkhouse
technical personnel due to the nature of the stored software programme.
Page 8

Replacing the pressure sensor
Locate the pressure sensor on the left hand side of the component assembly backplate
(see drawing009 or 010).
Remove the silicon pressure feed pipe from the sensor (see drawing 009).
Using a pair of side cutters snip the two zip ties to release the body of the pressure
sensor.
Using a terminal screwdriver, unscrew the two centre terminals + and – of the output
connectors on the logo power supply unit (see drawing 010).
Remove the black lead from input connector I7 on the logo main logic unit.
Take the new pressure sensor and trim the electrical leads to the same corresponding
lengths as the previous pressure sensor.
You are advised to fit ferrules to the trimmed leads.
Attatch the new pressure sensor to the backplate with two replacement zip ties.
Referring to drawing 010, fit the brown lead from the pressure senser to the + output
connection on the logo power supply as shown.
Connect the blue lead to the – output connection on the logo power supply.
Finally, connect the black lead from the sensor to I7 on the logo logic unit.
Refit the silicon pressure feed pipe to the pressure sensor.
Replacing logo modules
It is important to make a note of the relative connections to each of the logo terminals
before disconnecting.
The power supply unit
Unscrew terminals L1 & N , refer to drawing 004, remove live & neautral leads,
unscrew the two + and the two – terminals which connect into the wiring harness and
the pressure sensor (refer to drawing 010).
At the base and centre of the power supply there is a small grey latch. This should be
eased back using a small screwdriver and lifting the unit upwards will release it from
the din rail (refer to drawing 011).
Page 9

Logo! Expansion unit replacement
Make a note of all connections to the expansion unit before commencing disconnection.
Using a small terminal screwdriver remove the two power feed connections to L+ and M
at the top of the unit. Below these terminals there is a small grey sliding connector which
will be located to the left of the slot.
To disconnect, slide the locator to the right as shown in drawing 003, with all connections
removed, ease the expansion unit to the right, away from the main controller in drawing
003,one can see the three locating pegs which must be cleared from the main controller.
At the base of the expansion unit in the centre, there is a light grey plastic latch and when
pulled back slightly (using a small screwdriver) the unit can be lifted upwards and
released from the din rail. (refer to drawing 011).
To refit the expansion unit, refer to the above instructions in reverse order. Remember to
slide the grey slider to the left after the expansion unit is correctly fitted to the logic
controller.
Page 10

Mains Fail / Low Pressure Printed Circuit Assembly
Mains fail reset connector (s1)
12 way control panel membrane connectors (j2)
12 way wiring harness connector (j3)
Low pressure alarm connector (j1)
Page 11

To Remove Mains Alarm / Low Pressure Alarm PCB
1. Pull off the 12 way connector attatched to the wiring harness (j3)
2. Disconnect low pressure alarm connection to (j1)
3. One by one , squeeze closed the top part of each white plastic fixing post and ease the pcb upwards.
4. To refit a pcb , place the board fixing holes on each corresponding white plastic mounting post.
Gently press the board onto the fixing posts. Refit the respective connectors to j1 & j3.
*Refer to drawing 008 for connector locations*
Page 12

WIRING HARNESS REPLACEMENT
Please note that the mains feed to the power supply unit and compressor connecting
leads are not attached to the wiring harness. The pressure sensor is also a separate item.
To assist with the ease of replacement, (refer to drawing 010) make notes where
required.
During the removal of the original harness several zip ties may require removing and
disconnecting. These should be replaced when the replacement harness is fitted.
Referring to the four dc 24v output terminals.
The two outer terminals on the power supply unit should be disconnected. Leave the
inner connections, which feed the pressure sensor. Disconnect all inputs and power
feeds sequentially along the top of the logo! logic controller and expansion unit.
Disconnect all relay connections along the bottom of the logo! logic controller and
expansion unit with the exception of Q3/1 and Q3/2 (compressor feed).
Disconnect terminal leads to solenoid valves 1 & 2.
Carefully release the 12 way connector J3 & 3 way connector J1 from the mains
fail/low pressure printed circuit board. Remove the harness from the assembly
backplate.
Refit the replacement harness according to the instructions above but in reverse order.
The fitting should be straight forward as the harness is preformed and fitted with
identifying markers corresponding to the information on the modules and drawing 010.
Page 13

Replacing the control panel membrane
Should the control panel membrane become damaged, it is relatively easy to replace.
Remove the component assembly or chassis as described on page 6. Simply pull one
corner of the panel away from the case and continue until the whole panel has been
removed.
Pay attention to remove any adhesive film, which is still attached to the case.
Remove the protective brown sheet from the new replacement panel but leave the small
section behind the conductive ribbon in place.
Offer the long top edge of the control panel membrane to the lip on the angled section
of the case.
With this correctly positioned, begin to press down the control panel on to the case.
Take care not to leave any air bubbles.
When this is successfully fitted, slide the component assembly back into the case
remembering to fit the 12 way connector from the control panel onto the mains fail/low
pressure alarm pcb (j2).
Reassemble the phase II pump as described previously.
Page 14

Bed Hook Assembly
B. BEDHOOK REMOVAL
1. PLACE THE PUMP FACE DOWN WITH BED HOOKS FACING UP
2. REMOVE THE LOCKING NUT AND WASHER.
3. SLIDE OUT THE BED HOOK.
4. REFITTING IS AS ABOVE BUT IN REVERSE.
Page 15

PHP596 PHASE II PUMP TROUBLESHOOTING
SYMPTON CAUSE DIAGNOSIS
1) PUMP DEAD
MAINS SWITCH UNLIT A.PLUG FUSED B.CIRCUIT BREAKER TRIPPED
C.DISCONNECTED WIRE IN THE END
CAP
A.CHANGE FUSE
B.RESET
C.RECONNECT
2) PUMP DEAD
MAINS SWITCH LIT A.DISCONNECTED BROWN WIRE FROM MAINS SWITCH TO P.S.U.
B. FAULTY POWER SUPPLY UNIT
A. RECONNECT
B. REPLACE THE UNIT
3) PUMP FUNCTIONS
BUT MAINS SWITCH UNLIT A. MAINS SWITCH FAULTY A. REPLACE
4) PUMP OPERATION NORMAL BUT
VERY LOW PRESSURE OUT ( LOW
PRESSURE ALARM ACTIVATED)
A. CHECK INTERNAL PRESSURE
FEED PIPES FOR LEAKS
B. FAULTY COMPRESSOR
A. RECONNECT OR REPLACE
B. REPLACE COMPRESSOR
5) PUMP NOISY
HEAVY VIBRATIONS A. FAULTY COMPRESSOR B. BROKEN RUBBER COMPRESSOR
MOUNTS
A. REPLACE
B. REPLACE
FOR TECHNICAL SUPPORT CONTACT PARKHOUSE HEALTHCARE LTD
Page 16

LOGO LOGIC CONTROL UNIT
Page 17

LOGO LOGIC EXPANSION UNIT
Page 18