10. Dial in the Mains voltage using the control knob. Press the knob to enter the value.
11. After a few seconds the dots will stop moving across the screen and DONE will appear on the top right of
the display. Do not shut o the unit until the DONE message is displayed or the new calibration values will
not be stored.
If the message “Mains voltage calibration failed. Please enter the mains voltage again” appears this
indicates the dialed in line voltage is 20% dierent than the measured value (not the nominal value).
12. Power down the unit and move the calibrate jumper to the NORMAL MODE position. Be sure to orient the
jumper correctly so pins 1-2 and 3-4 are shorted.
System and line voltage calibration are complete.
13. Proceed to humidier calibration.
3.4 Line Voltage Calibration
IMPORTANT: Be sure to perform line voltage calibration after replacing a relay board.
1. Hold the override button (>37) while powering up the unit to enter the service screen.
2. On the second service screen select CAL LV.
3. Measure the line voltage at the AC connectors located at the bottom of the electrical enclosure.
4. On the CAL LV screen, dial in the mains voltage value that you measured and push the knob to enter it.
5. When calibration is completed, the screen will say Mains Voltage Calibration Complete.
If the message “Mains voltage calibration failed. Please enter the mains voltage again” appears this indicates
the dialed in line voltage is 20% dierent than the measured value (not the nominal value).
24 6600-0343-000 104 © 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Chapter 3: Calibration and Maintenance
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