Description Of Operating Modes And The Respective Parameters - Viessmann CS Installation And Operating Instructions Manual

8.5.2 Description of Operating modes
and their respective parameters
Defrosting:
During the defrosting process, Abt. or dEF. or dEg.
appears in the display.
Defrosting takes place via electrical heating. After
defrosting has ended, the compressor switches on after
the dripping time entered into P40. The evaporator fan
starts running when the evaporator temperature exceeds
the value entered into P41 or if the time set into P35 has
run out after the compressor has been switched on.
The evaporator temperature can be displayed in P08. If no
temperature sensor is connected to the evaporator, "OFF"
will be displayed in P08.
Defrosting operating mode:
The defrosting cycle can be selected via parameter P30:
Defrosting is initiated in definite cycles:
P30 = x0
Defrosting is initiated when the time from the last point
for beginning defrosting, as entered into P03, has expired.
Defrosting is ended when the evaporator tempera-
ture exceeds the value entered into P39 or when the
defrosting duration value entered into P04 is exceeded.
Defrosting is initiated, dependent upon the run time
of the compressor:
P30 = x1
The run time of the compressor will be reset to 0 at the
end of the defrosting process. If the run time of the
compressor reaches the value entered into P03, then
defrosting will be initiated.
Defrosting is ended when the evaporator tempera-
ture exceeds the value entered into P39 or when the
defrosting duration value entered into P04 is exceeded.
General notice (liability): the details of this technical documents serve for description. Consents regarding the availability of certain features or
regarding a certain purpose always require a special written agreement.
Page No. 27-GB
Defrosting will be initiated at specific points of time:
P30 = x2
Defrosting will be initiated when the internal clock
reaches one of the switch times entered into parameters
P12 - P23. If the value OFF has been entered into one
of the parameters P12 - P23, then this switch point is
locked.
Defrosting is ended when the evaporator tempera-
ture exceeds the value entered into P39 or when the
defrosting duration value entered into P04 is exceeded.
This parameter is released only when a DCF radio clock
receiver is connected to the Control unit.
Defrosting is initiated, dependent upon the state of
evaporator icing:
(only with an evaporator sensor connected)
P30 = x3
Defrosting is initiated when the evaporator temperature
is lower than the room temperature minus the value
entered into P38.
Example:
Room temperature = 5°C, P38 = 25
Defrosting is initiated when the evaporator temperature
falls below -20°C.
As a precaution, defrosting will be initiated when the
run time of the compressor exceeds the value entered
into P03. For this reason, it is recommended that the
value entered into P03 be approx. 10 hrs.
Defrosting is ended when the evaporator tempera-
ture exceeds the value entered into P39 or when the
defrosting duration value entered into P04 is exceeded.
8.5.2
We reserve the right to make technical changes!
GB