Airwell /yaz218, Руководство по обслуживанию, Страница: 41 / 84

CONTROL SYSTEM
11-2
SM YAZ218 1-A.2 GB
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 flow 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 orifice.
11.2.5 HMI
Three “7-Segments”
11.2.6 Temperature Sensors
CTT – Compressor Top Temperature
OAT – Outdoor Air Temperature
OMT– Outdoor middle coil temperature
OCT – Outdoor Coil (heat exchanger) Temperature
HST – Heat Sink Temperature
RGT1..4 – Indoor Unit 1..4 Returned Gas Temperatures
RLT 1..4
– Indoor Unit 1..4 Returned Liquid Temperatures
11.2.7 Base Heater
Heating element designed to melt any ice that is accumulated on the outdoor unit base
during low heating operation.
11.3 General Operating Rules
11.3.1 Initialization
Initialization process is the first operation done each time power is up.
The targets of the initialization are:
•
Addressing of IDU’s
•
Identification of connected IDU’s
•
IDU Matching Check
•
EEV’s homing (reset position)
•
Restoring Parameters from EEPROM/Jumpers/Dipswitches
11.3.1.1 IDU’s Initialization
11.3.1.1.1 Capacity Codes Setting
The capacity groups of the IDU’s are translated into capacity codes according to the
following table: