Outdoor Unit - Daikin E Series Service Manual

Description of Operation
1.2

Outdoor Unit

(Input)
Discharge pipe
thermistor
Outdoor air
thermistor
Heat exchanger
thermistor
Humidifying
thermistor
OL
CT
Fin thermistor for
fan driver
Indoor unit signal
Setting switch jumper
16

Outdoor unit

Compressor ON/OFF
control
Compressor
capacity control
Frequency control
3 min. stand-by
function
Defrost control
Switches to cooling cycle and defrosts.(Outdoor fan stops)
4-way valve
control
Energize/de-energize the 4-way valve coil according to the
operation mode.
The state of the 4-way valve is not switched during 3 minutes
after the operation mode is switched or the compressor stopped.
Warming up function
Preheat the compressor (open-phase operation) according to the
discharge pipe temperature.
Outdoor fan
control
Change fan speed according to the operation status.
On cooling operation, if outdoor temperature is low, the fan
sometimes stops.
After compressor stopped, outdoor fan will be operated about 1
minute.
Through the year
cooling control
The compressor will stop according to the outdoor temperature
and outdoor heat exchanger temperature in order to protect it
during cooling /drying operation.
Frost prevention
control
Overload control
Electronic expansion
valve control
Solenoid valve
control
Service diagnosis
function
In case of fault, operation stops automatically and the type of
fault is indicated by LED.
Forced operation
function
SiBE04-624
(Output)
Compressor
4-way valve
Fan motor
Electronic
expansion valve
Solenoid
valve
LED
indication
Humidifying
operation control
Motor for
humidifying rotor
Fan motor
(R3389)
Function and Control