01-41
1-27. VARIOUS PROTECTIONS
1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL
During the compressor in operation,
the discharge thermistior will detect discharge gas temperature.
The discharge gas temperature is controlled in the following protections.
115°C
105°C
Comp. stop
Comp. speed -20rps every 120 sec.
Discharge
temperature
(Fig. 26 : Discharge temperature control)
Discharge temperature protection 2
<Start condition>
Discharge temperature becomes more than 115°C.
<Operation>
The compressor is stopped, and it does not restart for 7 minutes.
<Release condition>
When the discharge temperature becomes lower than 70°C, the compressor restarts.
If the Discharge temperature protection 2 operates 2 times within 24 hours,
discharge temperature error will occur. <Permanent stop>
An error code is displayed each controller, it is reset by only the main power supply reset.
Discharge temperature protection 1
<Start condition>
Discharge temperature becomes more than 105°C.
<Operation>
The compressor speed -20rps every 120 seconds.
If the compressor operates at minimum speed for 120 seconds,
and the release condition isn't met, it will be stopped.
<Release condition>
When the discharge temperature becomes lower than
100°C, the compressor returns to the normal operation.
If the compressor was stopped by protection, it will restart
after 3 minutes ST.
70°C
Release protection 2
Hold
2. COMPRESSOR TEMPERATURE PROTECTION CONTROL
<Start condition>
When the compressor temperature thermistor detects more than 112°C.
<Operation>
The compressor is stopped at once.
<Release condition>
The compressor temperature becomes lower than 80°C after 3 minutes ST.
If the Compressor temperature protection operates 2 times within 24 hours,
discharge temperature error will occur. <Permanent stop>
An error code is displayed each controller, it is reset by only the main power supply reset.
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