QRAE II User Guide
Page 21
2.
Press the [MODE] button to advance through the digits.
3.
Press [Y/+] to increase the number.
4.
Press [MODE] until you reach Save or Quit.
•
Select Save and then press [Y+] to save the selection.
•
Select Quit and then press [Y/+] to exit from this menu and maintain the
previously saved selection.
4.4
Adjusting The Pump Stall Threshold (QRAE Pump
Only)
If the gas inlet is blocked but the pump does not shut down, or the pump shuts down too
easily with a slight blockage, the pump stall threshold value may be set too high or too
low.
Enter Diagnostic Mode to perform the following adjustments.
4.4.1
Adjust Pump Stall: High
This procedure sets the stall value for the pump’s high-speed setting. See page 39 for
directions on changing the pump speed from high to low, and vice versa.
1.
In Programming Mode, set the pump to operate at High speed.
Exit Programming Mode, shut down the QRAE II, and then restart it in
Diagnostic Mode.
In Diagnostic Mode, step through the menus until you come to Pump High Speed Stall.
•
The display shows idle maximum and minimum values (for example, 46/41),
plus the stall value with the pump operating at its high speed.
2.
Write down the maximum reading. This is your unblocked reading.
