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2-4. Function of Low Ambient Temperature (RT)
INPUT
RT
A. Condition of LOW RT
- RT sensor below 21℃
- When the RT sensor is over 22℃, the system comes to be "General Operation Mode".
- When the RT sensor is between 21°C to 22°C, the system keeps the previous mode.
B. Control
- When the temp of RT sensor is between 10°C to 22°C, COMP on/off diff is 5°C
- When the temp of RT sensor is below 10°C, COMP on temp is 2°C down, off temp is 2
2-5. Prevention of Compressor Restart
INPUT
N/A
It takes several minutes to protect Compressor:
(1) 6 minutes after Comp off
(2) 30 minutes at operation of Low RT, but 6 minutes when the doors open more than 20 seconds
2-6. Buzzer Sound
INPUT
- Forced Defrost Mode start
- Door Switch
- Initial Power Input
A. When Forced Defrost Mode start, the buzzer rings 3times.
B. After 2 minutes power's on, the buzzer rings 3 times.
C. At Short Circuit Test, the buzzer rings 1 times.
D. When door opens, the buzzer rings every 1 minute for 5 minutes.
CONTROL OBJECT
- R HTR
- COMP
CONTROL OBJECT
COMP
CONTROL OBJECT
Buzzer
14
2. FUNCTIONS
°C
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