Daikin SM-12-012, Руководство по обслуживанию

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Service Manual SM-Inverter_(i) 14
OVERALL CURRENT CONTROL
- To monitor the overall current and to restrict the compressor upper limit rotation in order to prevent
circuit breakers from exceeding the rated capacity.
- Detected during compressor running.
Model L1
ARXN/ RXN25 9.5A
ARXN/ RXN35 10.0A
ARXN/ RXN50 12.0A
ARXN/ RXN60 12.0A
- When the input current for running compressor exceeds L2, running frequency will be reduced by 1 step.
If current still exceeds L2, frequency will be reduced by another 1 step until total current falls between
L2 and L3.
- This protection cut in when the input current exceeds L1 for 2 seconds – (ARXN/RXN LV1B (9))
Compressor will stop and it is considered total current overload.
- If input current <L3, the compressor frequency is reset based on the OD ambient, set and room
temperature.
OIL RECOVERY CONTROL
- When the compressor operates for certain duration at low frequency, the oil level in the compressor may
become low due to incomplete oil return.
- To prevent damage to the compressor or compressor lock due to low oil lever.
- To promote refrigerant flow to carry the oil back to the compressor.
Entering condition:
•
Compressor rotation < 35 Hz, at the end of a 20 minutes timer: set lower limit rotation to 35 Hz
& EXV opening is fixed at current o 50 pulse. This control is reset when rotation > 35
Hz.