Electra WNG 25 DCI INV Service Manual page 27

CONTROL SYSTEM
Target frequency limits as a function of outdoor air temperature )OAT(:
OAT Range
OAT < 6
6 ≤ OAT < 15
15 ≤ OAT < 24
24 ≤ 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
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.
11.1.7.1 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
11-2
Cool mode limits
MaxFreqAsOATC
No limit
Minute
1
Minute
Min 10 Minutes
< 25 for heating.
Revision 0
Heat mode limits
No limit
MaxFreqAsOAT1H
MaxFreqAsOAT2H
1
Service Manual – WNG DCI
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