Pioneer LISAS-B-1403 Service Manual page 109

For Ceiling-floor (12-24K), Cassette (12-24K), Concealed Ducted (12-24K)
For other units:
1.3.2.4 Evaporator low temperature T2 protection.
For 12K-24K units,
---T2<0℃, the compressor will stop and restart when T2≥5℃.
---0℃≦T2<4℃, the compressor frequency will be limited and decreased to the lower level every 1 minute till
off.
---4℃≤T2≤7℃, the compressor will keep the current frequency.
---T2>7℃, the compressor frequency will not be limited.
For other units: When T2<2℃ and lasts for 3 minutes, the indoor has no capacity demand and resume till
T2≥7℃.
1.3.2.5 Condenser high temperature T3 protection
For 12K-18K Outdoor units:
---55℃<T3<60℃, the compressor frequency will decrease to the lower level every 3 minutes till F1 and then
runs at F1.If T3<54℃, the compressor will keep running at the current frequency.
---T3<52℃, the compressor will not limit the frequency and resume to the former frequency.
---T3>60℃ for 5 seconds, the compressor will stop until T3<52℃.
For other units: When T3>65℃ for 3 seconds, the compressor will shut off. When T3＜52,the compressor
will restart.
Electrical Control System
4
High
3
Medium
1.5
1
Low
5.0
High
4.0
Medium
3.0
2.0
Low
Electrical Control Function
107