Electra DCI 80, Service Manual

Page: 39 / 162

11-2
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11.3.2
Target Frequency Setting
The compressor target frequency is a function of the NLOAD number sent from
the indoor controller and the outdoor air temperature.
Basic Target Frequency Setting:
NLOAD Target Frequency
127
Maximum frequency
10 < NLOAD < 127 Interpolated value between minimum and maximum frequency
10
Minimum frequency
0 Compressor is stopped
Target frequency limits as a function of outdoor air temperature (OAT):
OAT Range Cool mode limits Heat mode limits
OAT < 6 No limit
6 OAT < 15
MaxFreqAsOAT1H
15 OAT < 24
MaxFreqAsOATC
24 OAT No limit
MaxFreqAsOAT2H
11.3.3
Frequency Changes Control
Frequency change rate is 1 Hz/sec.
11.3.4
Compressor Starting Control
Frequency
Time
Min 10 Minutes
1
Minute
Step 1
Step 3
1
Minute
Step 2
11.3.5
Minimum On and Off Time
3 minutes