12-22
CONTROL SYSTEM
Revision Y05-01
Service Manual - ALPHA
12.9.4
High pressure protection (excluding RH Group)
Mode: (Auto) Heating
Fan:
Any
Timer:
Any
I
Feel:
On
or
Off
Control
Function
Protect the Compressor from high pressure by switching OFF the OFAN and COMP.
ICT [
o
c]
Any
Off
Any
Off
COMP
OFAN
52
55
61
66
COMP is forced OFF
67
OFAN is force
Off
COMP is forced OFF
For all models except WAX
For WAX model
ON
BLINK
OPER
LED
Notes:
•
IFAN, HE1 and HE2 will be activated according to the relevant
Heating
Mode
Sect.
•
In case of any malfunction in the relay control circuit, the OCT is also
monitored during heating mode. Whenever OCT reaches 70
o
c, which indicates
a high pressure in the outdoor coil, the COMP will be forced off automatically.
The COMP can be turned on again only after the 3 min COMP ON delay and the
OCT is under 70
o
c. The OPER LED will not blink in this case.
