Normal Operation Control - Kaisai 06RY1 Service Manual

4 Normal Operation Control

4.1 Component Control during Normal Operation
Table 3-4.1: Component control during heating and domestic hot water operations
Component
Inverter compressor
DC fan motor
Electronic expansion valve
Four-way valve
Table 3-4.2: Component control during cooling operation
Component
Inverter compressor
DC fan motor
Electronic expansion valve
Four-way valve
4.2 Compressor Output Control
The compressor rotation speed is controlled according to the load requirement. Before compressor startup, the Mono
outdoor unit determines the compressor target speed according to outdoor ambient temperature, leaving water set
temperature and actual leaving water temperature and then runs the appropriate compressor startup program. Refer to
Part 3, 4.2 "Compressor Startup Program". Once the startup program is complete, the compressor runs at the target
rotation speed.
During operation the compressor speed is controlled according to the rate of change in water temperature, the refrigerant
system pressure and the refrigerant temperature.
4.3 Compressor Step Control
The running speed of six-pole compressors (used on all models) in rotations per second (rps) is one third of the frequency
(in Hz) of the electrical input to the compressor motor. The frequency of the electrical input to the compressor motors can
be altered at a rate of 1Hz per second.
202008
Wiring diagram
6kW
label
COMP
●
FAN
●
EXV
●
ST
●
Wiring
6kW 8/10/12/14/16kW
diagram label
COMP
●
FAN
●
EXV
●
ST
●
Midea CAC Confidential
8/10/12/14/16kW
Controlled according to load requirement from
●
hydronic system
Controlled according to outdoor heat exchanger
●
pipe temperature
Position (steps) from 0 (fully closed) to 480 (fully
open),
●
temperature, suction superheat and compressor
speed
On
●
Controlled according to load requirement from
●
hydronic system
Controlled according to outdoor heat exchanger
●
pipe temperature
Position (steps) from 0 (fully closed) to 480 (fully
open), controlled
●
temperature, suction superheat and compressor
speed
Off
●
M thermal Mono
Control functions and states
controlled according to
Control functions and states
according to
Mono
discharge
discharge
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