VRF AHU KIT4

Installation and Operating Manual
VRF-AHU Kit 15
HEAT (CN4) Digital input. When terminals are closed, the unit is operating in heating
mode and „HEAT“ LED lights up.
Note: Heating mode has priority. If both COOL and HEAT terminals are
closed, unit will run in heating mode.
0-10 V (CN3) Analog input terminal to control outdoor unit capacity.
Capacity steps:
0 - 0.5 V, 0 % capacity (unit stopped)
0.5 - 1.5 V, 10 % capacity (LED display digit 1)
1.5 - 2.5 V, 20 % capacity (LED display digit 2)
...
9.5 - 10.5 V, 100 % capacity (LED display digit 10)
T2 (CN10) T2 sensor is indoor evaporator intermediate temperature sensor,
install to the intermediate of temperature evaporator.
T2B (CN7) T2B sensor is indoor evaporator outlet sensor,
install to the outlet of the evaporator.
EEV (CN5) Connection with EEV. Please make correct selection at EEV according to
outdoor unit capacity.
SW2
Single or multi connection selection. Please refer to table 7-0.
ENC1
Knob to select indoor unit capacity.
LED explanation:
LED1 DEF unit is in defrost mode
LED2 COOL unit is in cooling mode
LED3 HEAT unit is in heating mode
LED4 RUN unit is in operation
CAUTION!
Signal input may not exceed 10.5 VDC, otherwise the control module will be destroyed.
The output signal (A0) must be optically isolated.