Airwell DLF 18 DCI, Technical Manual

Page: 39 / 102

12-1 <
CONTROL SYSTEM
SM DL
F 1
-A.1 GB
12.3.4.3 System operation whenever a thermistor fault occurs
#
Sensor
Single/Multi
Hydro/
Non Hydro IDU Status
ODU Mode
Fault
indication
System
Operation
Cool Heat
Deicer
Idle
T
echnician/
Installation
ITU
TPT
1 OAT Any H/NH Any † † † † † † Yes Normal
2 OAT Any H/NH Any † Yes Stop Comp
3 OCT Any H/NH Any † † † † † † Yes Normal
4 OCT Any H/NH Any † Yes Stop Comp
5 CTT Any H/NH Any † † † † † † Yes Stop Comp
6 CTT Any H/NH Any † Yes Normal
7 HST Any H/NH Any † † † † † † † Yes Stop Comp
8 OMT Any H/NH Any † † † Yes Stop Comp
9 OMT Any H/NH Any † † † † Yes Normal
10 RGT
i
/RLT
i
Multi NH
Inactive
(Available)
† † † † † † Yes Normal
11 RGT
i
/RLT
i
Multi NH
Inactive
(Unavailable)
† † † † † † No Normal
12 RGT
i
Multi NH Active † † † † Yes Normal
13 RLT
i
Multi NH Active † † † † Yes Normal
14
RGT
i
/ RLT
i
/
ICT
i
Multi NH Any † † † † Yes Normal
15 ICT single H/NH NA † † † † Yes Stop Comp
16 ICT single H/NH NA † † † No Normal
17 LWT single H NA † † † † † Yes Stop Comp
18 LWT single H NA † † Yes Normal
19 EWT single H NA † † † † † Yes Stop Comp
20 EWT single H NA † † Yes Normal
21 IRT single H NA † † † † Yes Stop Comp
22 IRT single H NA † † † No Normal
12.4 Indoor Unit Control
12.4.1 Load calculation
LOAD is calculated according to the difference between actual room temperature and user set point temperature
by PI control.
^ž|W[ ! " % '
scheme.
The actual NLOAD to be sent to the outdoor unit controller is based on the preliminary LOAD
% @ % !@
NLOAD limits as a function of indoor fan speed:
Indoor Fan Speed Maxium NLOAD Cooling Maxium NLOAD Heating
Low MaxNLOADIF1C MaxNLOADIF1H
Medium MaxNLOADIF2C MaxNLOADIF2H
High MaxNLOADIF3C MaxNLOADIF3H
Turbo MaxNLOADIF4C MaxNLOADIF4H
Auto MaxNLOADIF5C MaxNLOADIF5H