Heating Mode Protections - Electra WNG 7 Service Manual

CONTROL SYSTEM
12.9.3

Heating Mode Protections

Outdoor coil Deicing (excluding RH Group)
Mode: Heating, Auto (at heating)
Temp: Selected desired Temp
Fan: Any
Timer: Any
I FEEL: Any
Control function
Protects the Outdoor coil from ice formation by controlling COMP & RV operation.
Scope
This new deicer is designed to operate at extreme temp conditions. The deicing cycle
could be triggered from:
1. OCT temp and time between two consecutive deicing cycles.
2. Detection of ice forming by change of the OCT temp.
Both algorithms adjust the time between deicing cycles to optimize the A/C
performance. The algorithm will automatically increase the time between deicing cycles
and reduce the deicing cycle as needed.
The algorithm uses EEPROM data to operate.
12-20
Revision Y05-03
CONTENT
Service Manual - WNG