Run Hours Log; Analog Sensors; Setpoints/Setup; View Setpoints - Liebert CHALLENGER 3000 Operation And Maintenance Manual

2.4.4

Run Hours Log

The total operating hours of all major components in the unit can be monitored from the display and
are retained in nonvolatile memory. Run times are available for the following:
• Compressor
• GLYCOOL Coil (or CW Coil as used on Dual Cooling Unit)
• Fan
• (HUM) humidifier
• (RH1) reheat 1 (or Hot Water or SCR Reheat)
• (RH2) reheat 2
The component run hours for each individual component can be reset by selecting the run hours dis-
play screen for the desired component, then pressing ENTER within 5 minutes of applying power to
the control. The user will then be prompted to press ENTER to clear the selected component's run
hours.
NOTE
Run hours for a component should be reset ONLY when the component has been replaced.
2.4.5

Analog Sensors

The four (4) analog sensor inputs can be monitored from the display. The inputs are filtered, then dis-
played along with the text label assigned during setup. See Analog Setup on page 11.
2.5

Setpoints/Setup

Selecting Setpoints/Setup from the Main Menu will display the following selections:

• View setpoints

• Setup system
• Run diagnostics
• Change passwords
NOTE
Setpoints and system setup parameters are kept in nonvolatile memory.
2.5.1 View Setpoints
Control and alarm setpoints can be reviewed and/or changed through the display. The following table
lists the default setpoints and their allowable ranges.
Table 1 Default setpoints and ranges
Setpoint
Temperature Setpoint
Temperature Sensitivity
Humidity Setpoint
Humidity Sensitivity
High Temperature Alarm
Low Temperature Alarm
High Humidity Alarm
Low Humidity Alarm
Default Range
° °
72 F 40 to 90 F (5 to 32
° °
2.0 F 1 to 9.9 F (0.6 to 5.6
50% 20 to 80% RH
5% 1 to 30% RH
° °
80 F 35 to 95 F (2 to 35
° °
65 F 35 to 95 F (2 to 35
60% 15 to 85% RH
40% 15 to 85% RH
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Operation with Advanced Microprocessor Controls
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