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3 - Troubleshooting
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Manual Fan Speed Control
Under some circumstances such as testing acoustical devices where the fan noise would interfere with the test, it
would be advantageous to reduce the fan speed. If the test requires a very light load, the ambient temperature is low
and the duration of the test is short, the fan speed may be temporarily reduced. The turn-on default is "Automatic" so
this procedure must be performed, as needed, every time the line voltage is turned on. To manually control the fan
speed:
a. Simultaneously depress the "0" and "9” keys. EEINIT <model> will be displayed.
b. Using the Up/Down annunciator keys select FAN:MODE<AUTO.>.
c. Using the Up/Down arrows select FAN:MODE <MAN>
d. Press "Enter"
e. Simultaneously depress the "0" and "9" keys. EEINIT <model> will be displayed.
f. Using the Up/Down annunciator keys select FAN:SPEED <data>
g. Press "Enter Number".
h. Enter the desired speed (numeric entry range is 0 to 100%)
i. Press "Enter"
Disabling Protection Features
Except for overvoltage protection, the power supply's protection features may be disabled. This is not recommended
as a normal operating condition but is helpful under some circumstances such as troubleshooting. The turn-on default
is "NO-PROTECT OFF" (protection enabled) so this procedure must be performed, as needed, every time the line
voltage is turned on. To disable the protection:
a. Simultaneously depress the "0" and "9" keys. EEINIT <model> will be displayed.
b. Using the Up/Down annunciator keys select NO-PROTECT <OFF>.
c. Using the Up/Down arrows select NO-PROTECT <ON>.
d. Press "Enter"