Carel µC2SE User Manual page 39

- Hour counter compressor 1-2-3-4
c10, c11, c12, c13: These indicate the number of operating hours of compressor 1, 2, 3, 4, expressed in
hundreds of hours.
Pressing and together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
c10= operating hours comp. 1
c11= operating hours comp. 2
c12= operating hours comp. 3
c13= operating hours comp. 4
- Compressor operating hour counter threshold
c14: This sets the number of compressors operating hours, expressed in hundreds of hours, above which
the maintenance request signal is sent.
c14= 0: function disabled.
- Evaporator pump/fan 1 hour counter
c15: This indicates the number of operating hours for the evaporator
pump or fan 1, expressed in hundreds of hours.
Pressing and together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
- Condenser or backup pump/fan 2 hour counter
c16: This indicates the number of operating hours for the condenser pump (or backup) or fan 2,
expressed in hundreds of hours.
Pressing and together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
- Minimum OFF time before the next pump/fan start
c17: The diagram below shows an example of the operation of the pump and with burst (active when
H05=3, see parameter H05).
The dashed areas on the compressor line indicate the pump-compressor and compressor-pump delay
times.
Burst mode is disabled in standby and during an alarm when the pump is OFF.
At power ON the delay c17 must elapse before burst can start.
- Minimum pump/fan ON time
c18: This represents the minimum time that the pump remains ON for, see Fig. 5.i (active with H05=3
see parameter H05).
- Delay between valve and compressor
c19: Represents the delay to ensure the valve opening before the compressor starts. This parameter is
only available when EVD is connected.
• Defrost settings: parameters (d*)
The defrost has priority over the compressor times.
For the defrost function the compressors times are ignored, with the exception of C04 (see C04
description for the exceptions).
Key:
1. compressor;
2. pump;
3. burst.
- Enable condenser defrost/antifreeze
d01:
For heat pumps with air-cooled condensers (H01=1, 3, 8), this establishes whether defrost control must be
performed on the outdoor exchanger (evaporator in heating mode).
On the other hand, for water/water heat pumps with reversal on the gas circuit (H01=5-10), it enables antifreeze
control on the cooling water for the outdoor exchanger, which becomes the evaporator in heating mode, see d03.
If the fan is not present, the function is not enabled for air/water units.
d01=0: condenser defrost/antifreeze disabled;
d01=1: condenser defrost/antifreeze enabled.
In the defrost is running, the corresponding symbol will be shown on the display.
µC 2 SE - +030220426 - rel. 2.0 - 03.08.2009
C7
1
2
C18 C17 C18 C17 C18
3
Fig. 5.a.j
39
C8 C7 C8
C17 C18 C17