Vaillant eloBLOCK VE 14 EU I Series User Manual

Appendix
0020265768_01 eloBLOCK Installation and maintenance instructions 23
Code Meaning Remedy
F.073 Fault: Water pressure sensor Interruption/short circuit of water pressure sensor, interruption/short cir-
cuit to GND in supply line to water pressure sensor or water pressure
sensor defective
F.074 Fault: Water pressure sensor
Water pressure sensor signal outside correct
range (too high)
Line to water pressure sensor has a short circuit to 5 V/24 V or internal
fault in the water pressure sensor
F.075 Fault: Pump/water deficiency Water pressure sensor and/or pump defective, air in the heating installa-
tion, insufficient water in the product, adjustable bypass
F.159 Short circuit: Outdoor temperature NTC sensor Short circuit: Outdoor temperature sensor
F.161 Product frozen Flow rate sensor measures < 3 °C. The fault is automatically reset if T
°C > 4 °C.
No fault is displayed if the sensor is defective.
F.162 Domestic hot water cylinder frozen Cylinder temperature sensor measures < 3 °C. The fault is automatically
reset if T °C > 4 °C.
No fault is displayed if the sensor is defective.
F.180 Welded relay The fault is displayed if a welded relay has been detected five times in a
row.
The fault can be deleted by switching the unit on/off.
The electronics saves the fault report in the EEPROM (max. 1–5
counter).
A blockage can be eliminated by resetting to factory settings (D.96).
F.181 Contactor completely welded Welded contactor detected
D Pump status LED
LED display Meaning Cause Remedy
Lighting up green Normal operating mode – –
Flashing alternately red and
green
Fault Power supply too low/too high
Overheating
Pump resets automatically once
the fault has been eliminated.
Flashing red Pump blocked Pump cannot automatically
reset
Manually reset the pump.
Check the LED.
No display No power supply No power supply Check the power supply.
E LHM
Code Meaning Description
1159 Fault: Outdoor temperature sensor The outdoor temperature sensor is defective.
1162 Frost: Domestic hot water cylinder The temperature of the domestic hot water cylinder is too low.
1180 Product limp home mode The product is in limp home mode. Welded relay

Vaillant eloBLOCK VE 14 EU I Series Specifications

General

Brand	Vaillant
Model	eloBLOCK VE 14 EU I Series
Category	Boiler
Language	English