Airwell DLF 18 DCI, Technical Manual

Page: 52 / 102

12-2
CONTROL SYSTEM
SM DL
F 1
-A.1 GB
12.6 Thermodynamic Protections
12.6.1 IDU Protections
12.6.1.1 Condensate Water over Flow Protection
{@ +%}%= ¡
1 – When it is shorted with P4
0 – When it is not shorted to P4
P2 P3 Level
Don’t care 1 Normal
Don’t care 0 W
ANY
0
ON
NLOAD
PUMP
OFF
ON
OPER
LED
OFF
Overflow
Water Level
Normal
BLINK
NLOAD is
forced to 0
8 min 8 min
Overflow when
unit is ON
Overflow when
unit is OFF
8 min
12.6.2 ODU Protections
12.6.2.1 Protection types
There are 2 types of protection: Thermodynamic protections and Cut-Off protection
Thermodynamic Cut-Off protection
Compressor AC Over Current Low Pressure Switch
Compressor DC Over Current / Driver Overload High Pressure Switch
Heat Sink Overheating W
Indoor Coil Overheating Exceeding Operating Conditions
Outdoor Coil Overheating
Compressor Overheat Protection
Indoor Coil Defrost
12.6.2.2 Protection status
Thermodynamic protections are based on reducing compressor frequency when needed. The following represent the
possible protection status and their actions