11-2
CONTROL SYSTEM
SM PNXDCI 1-A.1 GB
Target frequency limits as a function of outdoor air temperature )OAT(:
OAT Range
Cool mode limits
Heat mode limits
OAT
No limit
< 6
6 ≤ OAT < 15
MaxFreqAsOAT1H
15 ≤ OAT < 24
MaxFreqAsOATC
24 ≤ OAT
No limit
MaxFreqAsOAT2H
11.1.4
Frequency Changes Control
Frequency change rate is 1 Hz/sec.
11.1.5
Compressor Starting Control
Frequency
Time
Min 10 Minutes
1
Minute
Step 1
Step 3
1
Minute
Step 2
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
25 for heating.
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