Appendix 6 - S400 Series Upgrade Introduction
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z The latest S480 ECU version is 32 (The last two bits), adding menu of adjusting rotating
speed for motor.
z The motor speed can be adjusted between 1200 to 2000 r/min. The defaults value is
1300 r/min. If there is no influence on the gutter, lower down the rotational speed can
decrease the noise and prolong the service life of the diaphragms.
Ⅱ. PAU, PCU Upgrade：
1．There is a document named OKI ISFP Setup (about 1.23MB) in the attachment of the e-mail. It
needs to be installed in the computer firstly to update the PAU and PCU. So please install this
document in PC or portable computer firstly. The picture below shows how to set up the
document.
Pay attention to down-left of the picture. The box of “Device ID” chooses “ML674003”, to the
down-right in “Frequency” box, the value should be 32.768 (Same as the frequency in PCU
board). On the up-right of the port, the default choice is COM1 Port. For different PC, you can
try COM1—COM4 port, until find the right one.
2．Open the front panel, and then find out the upgrade connector and jumper.
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