Airwell PNXA 12 DCI, Руководство по обслуживанию

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CONTROL SYSTEM
12-4
SM PNXADCI 1-A.1 GB
‘D’:
(Night Mode Speed)
NightPercent NA
‘E’:
-
End of Deicer
-
When Compressor changes to off (Ventilation)
- OMT and OCT fault in heat mode
Off On
‘F’:
-
Test Mode
Off On
12.1.6.3 OFAN Operation
With keeping the OFAN general rules above in the highest priority, the operation of the OFAN will
be operating as the following:
Cooling heating
•
The Triac and the Relay can never be activated at the same time
12.1.7 EEV (electronic Expansion valve) Control
EEV opening is defined as EEV = EEV
OL
+ EEV
CV
•
EEV
OL
is the initial EEV opening as a function of the compressor frequency, operation mode,
unit model and capacity.
•
EEV
CV
is a correction value for the EEV opening that is based on the Target CTT and
discharge superhea.
•
During the first 5 minutes of compressor operation EEV
CV
= 0.
•
Once the first 5 minutes are over, the correction value is calculated as follow: EEV
CV
=
EEV
SH Discharge
+ EEV
Target CTT
•
EEV
SH Discharge
For cooling, SH
DischargeC
= CTT- OMT
For Heating, SH
DischargeH
= CTT- ICT
•
EEV
Target CTT
For cooling,
Target CTT
=
Target_CTT_Alpha_C *OMT
- Target_CTT_Beta_C *ICT
+ Target_CTT_Gamma_C *Actual Compressor Frequency
+ Target_CTT_Delta_C
For Heating,
Target CTT
=
Target_CTT_Alpha_H *ICT
- Target_CTT_Beta_H *OCT