Installation instructions geoTHERM VWS/VWW 0020051574_01
62
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Description
Factory setting
Menu D: Perform diagnostics
In Menus D1 to D5 you can operate and test the heat
pump in diagnostic mode.
The diagnostic menus cannot be exited with any set-
ting apart from "Test = no" (Menu D1). An auto reset
occurs 15 minutes after the last button is actuated.
In the diagnostic mode, the pre-, minimum and
run-on times of the compressor, pumps and other
components are not heeded!
Malfunctions can occur if the diagnostic mode is fre-
quently turned on and off.
Diagnosis
D1
Refrigerant circuit
Test
> no
Comp. high pressure
11.9 bar
T outlet compressor
66 °C
Comp. low pressure
2.3 bar
T inlet compressor
0 °C
Test
: no/off/heating mode/hot water/cooling
*
. Set
the operating mode for the heat pump in order to
test its behaviour.
Comp. high pressure
: Display of coolant pressure
at compressor outlet.
T outlet compressor
(compressor output, high pres-
sure): Display of temperature sensor T1.
*
Comp. low pressure
:
Display of coolant pressure
at compressor inlet.
T inlet compressor
(compressor input, intake side):
Display of temperature sensor T2.
*
—
Diagnosis
D2
Refrigerant circuit
Overheat
4K
Subcooling
10K
Temp TEV inlet
10°C
Superheating
of the coolant calculated from T2
*
and
low pressure sensor. Only displayed when the com-
pressor is operating.
Subcooling
of the coolant calculated from T4
*
and
high pressure sensor. Only displayed when the com-
pressor is operating.
Temp TEV inlet:
Temperature at the inlet of the
thermal expansion valve
*
—
Diagnosis
D3
Central Heating
Current flow temp.
27 °C
Current return temp
24 °C
CH pump
Off
CH pressure
1.2 bar
Auxiliary heater
Off
Current
flow temperature
T6.
*
Current
return temperature
T5.
*
Status of
CH pump
: ON/OFF
CH pressure
(heating circuit pressure sensor).
Status of
auxiliary heating
: ON/OFF
—
Diagnosis
D4
Heat source
Brine pump
On
T return source
10 °C
T outlet evaporator
9 °C
Brine pressure
1.5 bar
Status of
brine pump
: ON/OFF
T return source
: Temperature of the heat source,
T3.
*
T outlet evaporator:
Heat source temperature at
the outlet of the heat pump, T8.
*
VWS only:
Brine pressure:
Pressure sensor for brine circuit
—
Table 8.4 Parameters that can be set in the Code level (cont.)
*
see Figs. 1 and 2 in the appendix
8 Controller
