Vaillant geoTHERM Installation Instructions Manual page 84

9 Adapting the appliance to the heating system
Display shown
Diagnosis
Coolant circuit
Superheating
Subcooling
Temp TEV inlet
Compressor
Diagnosis
Central Heating
Current flow temp.
Current return temp
CH pump
CH pressure
Auxiliary heater
9.7 Menu D: Carrying out diagnoses*
* see Figs. 1 and 2 in the appendix
84
Description
Superheating: Superheating of the coolant calculated
D2
from T2* and low pressure sensor. Only dis-
played when the compressor is operating.
6 K
i
10 K
If the display "-50 °C" appears, the tem-
perature sensor T2 on the compressor
10 °C
inlet is faulty. No warning message is
On
recorded in the Error History.
Subcooling: Subcooling of the coolant calculated
from T4* and high pressure sensor. Only dis-
played when the compressor is operating.
i
If the display "--°C" appears, the tempera-
ture sensor T4 on the Temp TEV inlet is
faulty. No warning message is recorded in
the Error History.
Temp TEV inlet: Temperature at the inlet of the ther-
mal expansion valve.*
Compressor: Compressor status:
ON/OFF/x min. (Time in minutes until the start
of the compressor when a heat request is
present)
D3
Current flow temp.: Current flow temperature T6.*
Current return temp: Current return temperature
27°C
T5.*
24 °C
OFF
CH pump: CH pump status: Rotation speed in %/OFF.
1.2 bar
CH pressure: Pressure in the heating circuit (heating
OFF
circuit pressure sensor).
Auxiliary heater: Status of auxiliary heating:
ON/OFF
Installation instructions geoTHERM 0020051574_04
Factory setting
—
—