Electra WNG 50 DCI Service Manual page 71

12.5.7 Base Heater Setting
The base heater will be working only when RV is "ON" according to the following graph:
Base
Heater
OFF
ON
0
When OAT is faulty the base heater will be "ON" continuously in HEAT mode.
12.5.8 Thermodynamic Protections
12.5.8.1 Protection level definition
Five protection levels are defined:
Normal – No protection status is ON.
Stop-Rise (SR) – System is in protection, first level
D1 - System is in protection, second level
D2 - System is in protection third level
Stop-Compressor (SC) – System is in protection fourth level
12.5.8.2 IDU Protection Level
The ODU receives the protection levels from the IDU. The protection levels are weighted
according to the following table:
Protection Level
Normal
Stop-Rise
D1
D2
Stop-Compressor
12.5.8.3 IDU Protections
12.5.8.3.1 Indoor Coil Defrost Protection
ICT
ICT < -2
-2 ≤ ICT < 0
0 ≤ ICT < 2
2 ≤ ICT < 4
4 ≤ ICT < 6
6 ≤ ICT < 8
8 ≤ ICT
Service Manual - WNG 50_60_80 DCI
2
Weight
0
1
2
3
0
Fast
Increasing
Increasing
SC SC
D1 D1
SR SR
SR SR
Norm Norm
Norm Norm
Revision Y05-02
CONTENT
OAT
ICT Trend
No change Decreasing
SC SC
D2 D2
D1 D2
SR D1
SR SR
Norm SR
Normal
CONTROL SYSTEM
Fast
Decreasing
SC
D2
D2
D2
D1
SR
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