Service manual

39
11
Outline of Control
Outdoor Unit
Operation start/Operation end
The compressor, solenoid valve, pulse motor valve (PMV), outdoor fan, etc. are controlled by a
command from the indoor controller. The slave outdoor unit starts/stops by a command from
the master outdoor unit.
Operation signal from indoor
Inverter drive
Outdoor fan output
Fixed-speed Mg-SW output
Each solenoid valve output
4-way valve output (OFF in cooling time)
PMV output
Thermostat ON/Thermostat OFF
Operation signal from indoor
Inverter drive
Outdoor fan output
Fixed-speed Mg-SW output
Each solenoid valve output
4-way valve output (OFF in cooling time)
PMV output
Operation start
Operation stop
OFF
OFF
OFF
OFF
OFF
ON
ON
ON or OFF
(By command from indoor)
ON or OFF
ON
Full
close
Full
close
Specified opening
2 minutes
30 seconds
Thermostat ON
Thermostat OFF
OFF
OFF
OFF
OFF
ON
ON
ON or OFF
(By command from indoor)
ON or OFF
ON
Full
close
Full
close
Specified opening
2 minutes
30 seconds