24
Room Air Conditioner
Part 2 Functions & Controls
5.9.2 18,24,30kBtu/h Model
1) Detection : check the output DC voltage of Current Transformer(CT).
2) Current Transformer Sensing Error
a) In initial power input, if the CT output is over 4.0V (25A) it shows.
Error Code 40 (defect in CT sensing)
3) CT 1 detection :
a) If total current exceeds CT1 value.reduce 1 step of operating Hz.
- Step down 10Hz from current step.
- If new Hz is below (cooling : Fc min,, heating :Fh min), then turn off the compressor.
b) After step down,if the total current exceed
„
1 for more than 5 sec. then step down 1 more step.
c) If the current continue below
„
1 for more than 1 min.,return the Hz to setting Hz.
4) CT 2 detection :
a) If total current exceeds CT2 turn off compressor.
And after 3 min turn on the compressor and check the current again.
b) If CT2 occurs 5 times in 1 hour,stop the operation and shows Error Code 22
Model
Cooling
Heating
CT 2
(kBtu/h)
(CT 1)
(CT 1)
18~30
11A
12A
14A
