Dry Mode - Electra WNG 25 DCI INV Service Manual

11.4.2 Indoor Fan Control in Heat Mode
Indoor fan speed depends on the indoor coil temperature:
ICTST ICTVL
11.5 Auto Cool/Heat Mode
When in auto cool heat mode unit will automatically select between cool and heat mode according
to the difference between actual room temperature and user set point temperature )∆T(.
Unit will switch from cool to heat when compressor is off for 3 minutes, and ∆T < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and ∆T < -3.
11.6

Dry Mode

As long as room temperature is higher then the set point, indoor fan will work in low speed and
compressor will work between 0 and
When the room temperature is lower than the set point, compressor will be switched OFF and
indoor fan will cycle 3 minutes OFF, 1 minute ON.
11.7 Protections
There are 5 protection codes.
Normal (Norm) – unit operate normally.
Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown1 (D1) – Compressor frequency is reduced by 2 to 5 Hz per minute.
HzDown2 (D2) – Compressor frequency is reduced by 5 to 10 Hz per minute.
Stop Compressor (SC) – Compressor is stopped.
11.7.1 Indoor Coil Defrost Protection
ICT ICT Trend
Fast
Increasing
ICT < -2 SC
-2 ≤ ICT < 0 D1
0 ≤ ICT < 2 SR
2 ≤ ICT < 4 SR
4 ≤ ICT < 6 Norm
6 ≤ ICT < 8 Norm
8 ≤ ICT Normal
Service Manual – WNG DCI
ICTL ICTH ICTT
MaxNLOADIF1C
Increasing No change
SC SC
D1 D2
SR D1
SR SR
Norm SR
Norm Norm
Hz.
Decreasing
SC
D2
D2
D1
SR
SR
Revision 0
CONTENT
CONTROL SYSTEM
Fast
Decreasing
SC
D2
D2
D2
D1
SR
11-5