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ZXD Electronic Controller
ZXD Condensing Unit BOM
Electronic Controller Parts
ZXD BOM
450 451 461
Digital scroll compressor controller
Fan speed controller
The controller has been pre-programmed with a number of parameter values that are most likely correct. Individual installation
requirements, however, may make it necessary to alter parameter settings.
The control target of the compressor controller is to maintain the suction pressure (or saturated suction temperature) at a dened
value by varying the available compressor capacity.
The control target of the fan speed controller is to maintain the average condenser mid coil temperature and hence the average
discharge pressure at a dened value. This is achieved by varying the fan speed. The setpoint can be altered using the SEtF parameter.
Keyboard
+ Press Together for 3 seconds to Lock and unlock keyboard
+ Press together for 3 seconds to enter programming mode
+ Exit programming mode or wait 30 seconds
Pre-Set Parameters
Parameter Value Unit Description
SEtC -6 °C Evaporation temperature set point
SEtF 25 °C Fan speed control condenser mid-point temperature
dEU tMp - Saturated Temperature measurement
CF °C - Temperature unit
PMU Bar - Pressure unit
dSP1 p2 - Upper LED display – condensing temp.
dEU1 tMp - Upper LED default - temperature
dSP2 p1 - Lower LED default display – Suction Pressure
dEU2 prs - Lower LED default - pressure
Warning: Before changing set points, installer must check refrigerant type, measured value units for compressors and fans.
Example: FtyP(Refrigerant type), dEU(Measured value units), LSE/HSE (limitation of set values)
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