Carrier 42/38KCJ024713, Техническое и сервисное руководство

Страница: 23 / 27

Exploded view & spare-part
21
7.3.3 Defrost (only available to heating mode)
7.3.3.1 Defrosting Conditions
Starting Of Defrosting Condition (meet one of the following is ok):
(1)Accumulated compressor operating time when temperature of outdoor heat
exchanger coil T3 is below -2°C reaches up to over 46 minutes.(When T3 is over 20°C,
calculate time again.)
(2)
Under evaporator high temperature protection, the accumulated time when outdoor
fan motor is off and compressor is on reaches up to over 90 minutes .(When T3 is over
20°C, calculate time again.)
High temperature defrosting condition:
Under high temperature protection of evaporator, the time when outdoor fan is shut
down but compressor is not has been accumulated for up to 90 minutes.
7.3.3.2 Defrosting Action
Four-way valve, indoor fan, outdoor fan are shut down. Compressor keeps on.
7.3.3.3 Ending Of Defrosting Condition (meet one of the following is ok):
(1)Time of defrosting lasts 10 minutes.
(2)Temperature of outdoor coil T3 is up to 20°C.
7.3.4 Cooling Mode
7.3.4.1 Four-way valve is closed.
If four-way valve is open before the machine enters cooling mode, then four-way valve
will be closed at the first time, the compressor starts under the cooling mode.
7.3.4.2 Conditions for the compressor and outdoor fan action (Ts = set temperature)
7.3.4.3 Action of Indoor Fan
HIGH/LOW/AUTO fan can be switched over by your comfort.
Auto fan under cooling mode.
T2>32°C Set fan speed
Room temperature down T2>22°C Set fan speed
20°C <T2<22°C Low
T2<20°C Off
Condition Compressor and outdoor fan
Room temperature up T1-Ts=0°C Off
T1-Ts>1°C On
Room temperature down T1-Ts>0°C On
T1-Ts=0°C Off
Condition Fan speed
Room temperature up T1-Ts>2°C Hi.
1°C < T1-Ts <2°C Low