Airwell DLF 18 DCI, Technical Manual

Page: 49 / 102

12-2
CONTROL SYSTEM
SM DL
F 1
-A.1 GB
12.5.2.1 Compressor Min On/Off time
Compressor minimum ON and OFF time is 3 minutes except during protections.
12.5.2.2 Compressor Startup
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12.5.2.3 Compressor start up fail
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second and up to 3 minutes it will report a compressor lock or unusal behavior.
12.5.2.4 Compressor operation while OFAN Error
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to OFF until OFAN error will recover.
12.5.2.5 Speed Change Limitations
Acceleration and deceleration will be 1 RPS/sec.
12.5.2.6 Speed Step Limitations
12.5.2.7 Illegal frequencies
Illegal Frequencies are values that the unit is not allowed to be working at. The frequencies and values within
tolerance of ±2 Hz are not allowed.
12.5.2.8 Compressor shutdown Cases
# Shutdown Reason
1 Single: ODU NLOAD=0 (or IDU protections)
2 Single: IDU change to STBY.
3 Multi: All IDU`s become inactive.
4 Deicing (both when going from heat to cool and from cool to heat)
5 ODU Protections
6 Sensor fault: according sensor fault list
7 HPS protection
8 LPS protection
9 OFAN-ERR (Up and Down)
10 PFC TRIP
11 W
Time (min)
Max Allowed
Frequency
Compressor Starts up
(Actual Freq>0)
Maximum Allowed Frequncy
after compressor starts up
Step1Freq
Step1Time Step2Time Step3Time Step4Time
Step2Freq
Step3Freq
Step4Freq