Maintenance Counters - Honeywell HVAC400x Applications Manual

0 Hz
M1
M2
Fig. 50. The start or stop of the auxiliary pumps (P3.15.8 = Bandwidth, P3.14.9 = Bandwidth delay)
The pump that controls the system operates at a
A. frequency that is near the maximum (-2Hz). This
increases the number of pumps that operate.
The pump that controls the system operates at a
B. frequency that is near the minimum (+2Hz). This
decreases the number of pumps that operate.
10.16

Maintenance Counters

A maintenance counter tells you that maintenance must be done. For example, it is necessary to replace a belt or
to replace the oil in a gearbox. There are two different modes for the maintenance counters, hours or
revolutions*1000. The value of the counters increases only during the RUN status of the drive.
WARNING!
Do not perform maintenance if you are not authorized. Only authorized electricians are allowed to
perform maintenance. There is a risk of injury.
NOTE: The revolutions mode uses motor speed, which is only an estimate. The drive measures the speed every
second.
When the value of a counter is more than its limit, an alarm or a fault shows. You can connect the alarm and fault
signals to a digital output or a relay output.
When the maintenance is completed, reset the counter with a digital input or parameter P3.16.4 Counter 1 Reset.
NOTE: Only Counter 1 parameters are listed below. In addition, there are similar Counter 2 and Counter 3
parameters. See
P3.16.1 COUNTER 1 MODE (ID 1104)
You can use this parameter to enable the maintenance counter.
ID1098
ID1097
A
5.16 Group 3.16: Maintenance Counters for a complete list.
HVAC400X – APPLICATION MANUAL
ID1098
B
D
C
Legend
The number pumps that operate increases or
decreases, if the PID controller cannot keep the process
C.
value feedback in the specified bandwidth around the
setpoint.
D. The specified bandwidth around the setpoint.
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EN2B-0417GE51 R0719