Filter
Top Products
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)
43
6. Apply mains power to the humidifier, while keeping the production test button depressed.
The display should read: “PTS”. This ensures that the new software version number will be
properly updated in the EEPROM.
7. Turn off the mains power to the humidifier, and remove the tool.
8. Check that the humidifier powers up normally, and complete a full performance test
(section 8).
(An alternative method for software versions 7.21 onward.)
1. Perform steps 1 to 4 as above.
2. Apply mains power to the humidifier. An error code E05 (EEPROM version is older than the
ROM version) or E06 (EEPROM version is newer than the ROM version) will be given.
Press the Mute button to confirm that the software is to be changed to the version in the
ROM. Once the Mute button is pressed the software version is changed and the MR850 is
automatically restarted.
3. Complete a full performance test (section 8).
7.2.7 Replacing the Mains Cable
1. Open the case (section 7.2.1).
2. Unscrew the three mains cable wires from the terminal blocks on the power PCB (see
Figure 7.4), and cut the cable tie on the PCB.
3. Slide the mains cable retainer away from the rear of the case.
4. Replace the power cord, and affix to the case by forcefully pushing the retainer back into
position (towards the rear of the case).
5. Attach the 3 mains cable wires to the terminal blocks on the power PCB (see table below for
correct mains cable wiring), and attach the phase and neutral wires with a new cable tie.
CORD TYPE PHASE NEUTRAL EARTH
USA / JAPAN
(115 / 100 V~)
Black
or Brown
White
or Blue
Green
or Green/Yellow
EUROPEAN / IEC
(230/ 127 V~)
Brown Blue Green / Yellow
NZ / AUSTRALIA
(230 V~)
Brown Blue Green / Yellow
WARNING:
When attaching the mains cable wires, ensure that the correct polarity of the mains
wiring is followed. The table given above only applies to power cords supplied by Fisher
& Paykel Healthcare.
6. Close the case (section 7.2.8).
7.2.8 Closing the case
1. Make sure that all harnesses that were previously disconnected have been reconnected. If
the mains wiring was disconnected during servicing, check that the mains polarity is correct
(see table in section 7.2.7).
2. Slide the power PCB back into position, ensuring that the side panel slides in the slots and
latches into the case rear.
3. Place the control PCB back into position in the front of the case, ensuring all clips are
located properly.
4. Slide the case together, and replace the four screws.
5. In order to check that the humidifier is working properly, complete a full performance test as
outlined in section 8.