Airwell DLF 18 DCI, Technical Manual

Page: 48 / 102

12- >
CONTROL SYSTEM
SM DL
F 1
-A.1 GB
12.5 Run Mode
@ @"^
(at customer site).
System can go from run mode to other operation modes through keyboard or serial ports.
12.5.1 Mode Setting
^ W ^ ¡
1. STBY – Standby mode
2. COOL - the unit operate at cooling cycle
3. HEAT - the unit operates at heat pump cycle (deicer will be treated as sub-mode of heat
mode in the thermal Mode setting).
^ {{W% "%@
STBY
.
12.5.2 Compressor Speed Control
The following diagram describes the sequence of the Target Frequency calculations:
NLOAD calculation
Max/Min freq limitation
NLOAD re-calculation
(Every 1minute)
In Protection (Prot status
other than Normal)?
StepFreq control
Illegal freq checking
Final target freq
Yes
No