Airwell YAZE218, Service Manual

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SM YAZE218 1-A.2 GB | 11—1
11—CONTROL SYSTEM
11. CONTROL SYSTEM
11.1 Abbreviations
e D n o it a i v e r b b A nition
A/C Air Condition
BMS Building Management System
PWR System Power
CTT Compressor Top Temperature sensor
DCI DC Inverter
EEV Electronic Expansion Valve
HE Heating Element
HMI Human Machine Interface
HST Heat Sink Temperature sensor
Hz Hertz (1/sec) – electrical frequency
ICT Indoor Coil Temperature (RT2) sensor
IDU Indoor Unit
MCU Micro Controller Unit
OAT Outdoor Air Temperature sensor
OCT ODU Coil Temperature sensor
ODU Outdoor Unit
OFAN Outdoor Fan
PFC Power Factor Corrector
RAC Residential A/C
RC Reverse Cycle (Heat Pump)
RGT Return Gas Temperature sensor
RPS Rounds per second (mechanical speed)
RV Reverse Valve
SB,STBY Stand By
SUCT Compressor Suction Temperature sensor
S/W Software
TBD To Be De ned
TMR Timer
11.2 Product Overview
11.2.1 Compressor
DC brush less and sensor less motor inverter driven compressor.
11.2.2 Outdoor Fan
AC motor.
11.2.3 RV
Reverse Valve set the direction of refrigerant ow in the system, thus setting the operation
mode for cooling or heating.
When the solenoid is powered, system will work in heat mode.
11.2.4 EEV’s
Expansion valve operated by step motor which controls the size of the ori ce.
11.2.5 HMI
Three “7-Segments”