Technical Information
6HUYLFH0DQXDO
FCG 3
FCG 2
FCG 1
TCG1
TCG2
TCG3
88
64
48
240
360
180
TCG 1sec TCG 2sec TCG 3sec
Time
Frequency
FCG3
FCG2
FCG1
Detect malfunctions of temperature sensor any time.
(2) Indoor Pipe Temperature Sensor
detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected.
(3) Protection of Temperature Sensor
1. When short-circuit occurs to the temperature sensor for 30s:
The temperature sensor overheats. In this case, the complete unit will stop for protection. At the same time, the temperature protection
and temperature sensor malfunction will be shown.
2. When break-circuit occurs to the temperature sensor for 30s:
The unit will stop and the temperature sensor malfunction will be displayed.
Frequency Control
Frequency Initial Setting<Outline>When starting the compressor, or when conditions are varied due to the change of the room, the
frequency must be initialized accordingto the
D value of the indoor unit and the Q value of the indoor unit.Q value: Indoor unit output
D Signal)
1.P control Calculate
D value in each sampling time (20 seconds), and adjust the frequency according to its difference from the
frequency previously calculated.
D value.
When the
D value is small lower the frequency.
When the
D value is large increase the frequency.
3.Frequency management when other controls are functioningWhen frequency is drooping;Frequency management is carried out only
when the frequency droops.For limiting lower limitFrequency management is carried out only when the frequency rises.
4.Upper and lower limit of frequency by PI controlThe frequency upper and lower limits are set depending on indoor unit.When low
noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit, theupper limit
frequency must be lowered than the usual setting.
3-minutes Standby
Prohibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)
Compressor Protection Function
When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used
when defrosting.)
Discharge Pipe Control
Outline
The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a
certain level, the operating frequency upper limit is set to keep this temperature from going up further.
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