Electra DCR 25 Service Manual page 29

CONTROL SYSTEM
Target frequency limits as a function of outdoor air temperature (OAT):
OAT Range
OAT < 6
6 ≤ OAT < 15
15 ≤ OAT < 28
28 ≤ OAT
11.1.4 Frequency Changes Control
Frequency change rate is 1 Hz/sec.
11.1.5 Compressor Starting Control
Frequency
Step 3
Step 2
Step 1
Minute
11.1.6 Minimum On and Off Time
3 minutes.
11.1.7 Indoor Fan Control
10 Indoor fan speeds are determined for each model. 5 speeds for cool/dry/fan modes and 5
speeds for heat mode.
When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate
constantly at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set
according to the cool/heat load.
11.1.8 Turbo Speed
The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is
selected and under the following conditions:
•
Difference between set point and actual room temperature is bigger then 3 degrees.
•
Room temperature > 22 for cooling, or < 25 for heating.
11-2
Cool mode limits
MaxFreqAsOATC
No limit
1
Minute
1
Min 10 Minutes
Revision Y05-01
CONTENT
Heat mode limits
No limit
MaxFreqAsOAT1H
MaxFreqAsOAT2H
Time
Service Manual - Delta DCI