Service manual

15-2
CONTROL SYSTEM > GC 24
SM HADDCI 1-A.2 GB
15.2 Product Overview
15.2.1 Block Diagram
15.2.2 Compressor
DC brush less and sensor less 2.5/3 horsepower motor inverter driven compressor.
15.2.3 Outdoor Fan
DC brush less motor.
15.2.4 RV
Reverse Valve set the direction of refrigerant flow in the system, thus setting the operation mode for cooling
or heating.
When the solenoid is powered, system will work in heat mode.
15.2.5 EEV’s
Expansion valve operated by step motor which controls the size of the orifice.
15.2.6 HMI (Optional for single)
Three “7-Segments” + four Push buttons
15.2.7 Dry Contacts
Dry contacts are used to interface the system with an external building management system (BMS).
● Night input. Switches the system to night mode when closed.
During night mode, the outdoor unit speed will be reduced in order to reduce the system noise level.
● SB input. System will be turned to Stand-by when the contact is closed.
● Power Shedding input. Limits the maximum power consumption when closed.
● Forced Mode input. Used to force the operation mode of the system
● Alarm output indicates a failure at the system.
Alarm output will be activated when there in the following ODU Faults/Protections 1 to 6, 8 to 22,
24, 25, 27 and 28.
Alarm output will be OFF when the Fault/Protection is cleared.
Input
Filter
PFC
IPM
Switching
Power
Appl ic at io n
Cont rol
Communication
Comp.
OFAN
RV
Base
Heater
LED’sEEV’s
Alarm
Temperature Sensors
Dry Contac ts
Configuration Jumpers
EEMP
Drivers
Drivers, A/D
1 to 4 IDU’s
Cont r ol
Communication
Power
HMI
1ph/ 230V/ 50Hz
CONTENTS