Carel MuC2SE, User Manual

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17
µC
2
SE process c030220416
- rel. 2.3 - 17.05.2018
Other configuration parameters (par. c14, /23, H09, P35)
c14 establishes the number of operating hours of the compressors/pumps, expressed in hundreds of hours, over which to activate the maintenance
request signal (Hc1, Hc2). c10 and c11 are read only parameters and indicate the number of operating hours of the compressors 1 and 2, expressed
in hundreds of hours. c15 and c16 are read only parameters and they indicate the number of evaporator and condenser pump operating hours,
expressed in hundreds of hours. The maintenance request signal for the pumps is always Hc1. Pressing and simultaneously, in the timer value
display phase, resets the same at zero and consequently to the cancellation of the maintenance request. H09 allows to disable the modification of
the “Direct” and “User” parameters from keyboard; however it allows to display the parameter values. The timer reset function is also disabled. P35
allows to alter the status of the alarm relay, if it is active.
4.3 Minimum and maximum fan speed calculation
This procedure should only be performed when the fan speed control boards are used (code MCHRTF*).
When ON/OFF modules are used (code CONVONOFF0) or alternatively the PWM to 0 to 10 V converters
(code CONV0/10A0) are used, parameter F03 should be set to zero, and parameter F04 to the maximum
value. Given the different types of motors existing on the market, it must be possible to set the voltages
supplied by the circuit board corresponding to the temperatures of minimum and maximum speeds. In this
regard (and if the default values are not suitable), proceed as follows:
•
set the parameter F02=0 and reset F03 and F04 to zero;
•
the condensation set point has been modified to take the output signal to the maximum value (PWM);
•
increase F04 until the fan operates at a sufficient speed (make sure that, after having stopped it, it can
rotate freely when released);
•
“copy” this value to parameter F03; this sets the voltage for the minimum speed;
•
connect a voltmeter (set to AC, 250V) between the two “L” terminals (the two external contacts);
•
increase F04 until the voltage stabilises at around 2 Vac (inductive motors) or 1.6, 1.7 Vac (capacitive
motors);
Once the value has been found, it will be evident that even when increasing F04 the voltage no longer
decreases. Do not increase F04 further so as to avoid damaging the motor;
•
restore the correct condensation set point.
The operation is now completed.
Par. Description Def Min Max U.M.
c10 Compressor 1 timer 0 0 800 100 h
c11 Compressor 2 timer 0 0 800 100 h
c14 Maintenance request threshold
0 = function disabled 0 0 100 100 h
c15 Evaporator pump timer 0 0 800 100 h
c16 Condenser pump timer 0 0 800 100 h
/23 Unit of measurement: 0/1 = °C/°F 0 0 1 -
H09 Lock keypad: 0/1 = disabled/enabled 1 0 1 -
P35 Modify alarm relay status via PRG/mute: 0/1=No/Yes 0 0 1 -