SIE-86 General Functionality
Main Function 31
1.17 Compressor Protection Function (H / J Type)
Outline An refrigeration oil level descent and progression of the dilution which will arise at operation of the
compressors will be avoided by controlling the upper limit of frequency at the edge of compressor’s
changeover from OFF to ON as follows.
Processing
1. A choice of a constant based on the starting conditions.
A constant is chosen in the following conditions at the start of compressors.
1 In case TCG0 < TDEN
A type starting is adopted.
2 In case TCG0 ≥ TDEN
B type starting is adopted.
∗ TCG0 is set only at power-ON and then start, keep counting regardless of the operation mode.
∗ The judge above should be done only at the start of compressors.
∗ TCG : Timer guard for compressor protection ∗ TDEN : Power on time
2. Frequency control
The following control is carried out after the judge of 1. above. A constant is chosen in accordance with A,
B decided in 1).
1 Timer TCG1 (A,B) will start at the start of compressors.
The upper limit of output frequency in between TCG1 (A,B) is set at FCG1 (A,B).
2 In exceeding TCG1 (A,B), timer TCG2 (A,B) starts and the upper limit of output frequency in between
TCG2 (A,B) is set at FCG2(A,B).
3 In exceeding TCG2 (A,B), timer TCG3 (A,B) starts and the upper limit of output frequency in between
TCG3 (A,B) is set at FCG3(A,B).
4 In exceeding TCG3 (A,B), the frequency limit is cancelled.
3. Others
1 If compressors go off at the start of this function, the timer under counting should be reset and
cancelled the frequency limit.
2 This function doesn’t work under the control of defrosting.
∗ FCG : Frequency guard for compressor protection
∗ TCG : Timer guard for compressor protection
Setting a constant H/J type Setting a constant H/J type
FCG1A 46 Hz TCG1A 120 sec
FCG1B 46 Hz TCG1B 120 sec
FCG2A 66 Hz TCG2A 570 sec
FCG2B 66 Hz TCG2B 360 sec
FCG3A 90 Hz TCG3A 120 sec
FCG3B 80 Hz TCG3B 180 sec
TDEN 30 min
To Next Page
Loading...
Need help?
General
