3WAY SYSTEM
Control Functions
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11. Alarm Information
The upper limit discharge temperature is 106°C for all compressors.
When the discharge temperature reaches 106°C, that compressor is stopped and restarted.
If the same high discharge condition occurs 5 times, then an alarm occurs.
After a compressor has stopped, that compressor will not operate until the temperature has dropped to or below the
start-prohibit temperature.
11-1-1. Discharge Temperature Protection
11-1-2. Discharge Sensor Trouble Detection Control
11-1. Discharge Temperature
Discharge temperature protection list
Compressor No.
Type
Stop temp.
Start-prohibit temp.
Alarm display
Compressor 1
Inverter
106°C
80°C
P03
Compressor 2
Constant speed
106°C
80°C
P17
Discharge sensor failure list
Compressor No.
Type
Alarm display
Compressor 1
Inverter
F04
Compressor 2
Constant speed
F05
* In this case, possible causes include sensor failure and compressor overheating caused by insufficient
refrigerant.
* In this case, it is possible that the discharge temperature from a different compressor unit is being detected, due
to an error in the installation of the discharge sensor.
An alarm occurs if the discharge temperature remains abnormally high (above 80°C), when the system has been
stopped for 60 minutes.
The alarm also occurs if the sensor temperature is at or above the abnormal temperature (100°C) when 30
minutes have passed after the compressor stopped.
11-1-3. Discharge Temperature Disconnection
Compressor No.
Type
Alarm display
Compressor 1
Inverter
H05
Compressor 2
Constant speed
H15
* When the ambient temperature is lower than approx -10°C, it is 30 minutes.
* When the ambient temperature is higher than approx -10°C, it is 10 minutes.
An alarm occurs if the discharge temperature doesn't change by 2°C or more when 10 – 30* minutes have passed
since the compressor started.
SM830226-003WAYECO-iSYSTEM.in4040SM830226-003WAYECO-iSYSTEM.in4040 2013/02/1311:52:292013/02/1311:52:29
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