Liebert iCOM Microprocessor TM-10098 - Manual (Page 39)

iCOM
Controls Training and Service Manual
during the second time frame the cooling process locks off and will require a
power off sequence.
Next Maintenance Calculation
Foreword
The next maintenance calculation will help run the Liebert Environmental unit in an
optimum way, to ensure minimum components stress resulting in increased
reliability.
Calculation of next Maintenance Parameters
The following components are included in the calculation individually:
• Fan(s)
• Compressor
1
• Compressor
2
• Electric
Heaters
• Humidifier
For each individual component the next maintenance will be calculated from
following parameters:
1. Standard service interval (1, 2, 4 or 6 times a year, to be programmed).
2. Working hours (counted).
3. Number of starts (counted).
4. Average running time (calculated).
5. Optimum number of starts per hour (to be programmed).
6. Maximum number of starts per hour (to be programmed).
7. Maximum bonus to enlarge time to next maintenance (to be programmed).
8. Maximum penalty to reduce time to next maintenance (to be programmed).
The Maintenance Calculation is done as follows:
Basic: maintenance frequency (1). The control counts the working hours of the
component, as well as the number of starts.
The working hours and the number of starts are compared with the programmed
optimum / maximum starts per hour. This results in “Wellness Factor”.
This factor, in accordance to the service interval, will add a “Bonus” to increase the
time before the next maintenance, or will add a “Penalty” to decrease the time
before the next maintenance. In simple words: If a component starts very often,
the time to next maintenance will be decreased, if it starts rarely, the time to next
maintenance will be increased.
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