Appendix; A Detecting And Rectifying Faults; B Inspection And Maintenance Work - Overview - Vaillant VIH R Series Safety Instructions

Appendix

A Detecting and rectifying faults
Fault Possible cause
No flow rate at the water 1.
tap
2.
3.
Low flow rate and pres- 1.
sure at a water tap
Water from the water tap 1.
is cold
2.
3.
4.
5.
6.
Hot water temperature at 1.
the water tap too high
2.
Irregular domestic hot 1.
water output at the water
2.
tap
VIH .. .../3 MR only 1.
The control panel does
not display any func-
tions.
VIH .. .../3 MR only 1.
F.01/F.02
2.
VIH .. .../3 MR only 1.
F.03 2.
Inspection and maintenance work – Overview
B
The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-
tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of
the intervals listed.
# Maintenance work
1 Check the connections for tightness (visual inspection).
2 Check the temperature and pressure expansion relief valve (by actuating
it).
3 Check the pressure in the expansion vessel (annual manometer).
4 Check the tightness of the flange in the cleaning eye (visual inspection)
5 Check the state of wear of the magnesium protection anode
6 Clean the cylinder
7 Check the contacts of the external current anode for corrosion
0020241666_01 Safety instructions
The water supply valve is closed.
The main filter is blocked.
The pressure reducer is not installed correctly.
The filter in the cold water supply is clogged.
The cylinder was not started up.
The water supply valve is not fully open.
The heat generator is not operating.
The thermal cut-out was triggered.
The 2-port motorised valve is defective.
The immersion heater is defective.
The thermostat is set too high.
The thermostatic valve is not present or is
defective.
The expansion vessel is defective.
The thermal cut-out has been triggered
(thermal control).
The power supply is interrupted.
Interruption in the cable for the top (F.01) or
bottom (F.02) cylinder temperature sensor
Top (F.01) or bottom (F.02) cylinder temperat-
ure sensor is defective.
The external current anode is defective.
The cylinder is corroded.
Remedy
1. Check and open the water supply valve.
2. Close the water supply valve, clean the filter
and the water pressure reducer.
3. Check whether the pressure reducer has been
installed correctly.
1. Close the cold water supply, clean the filter for
the water pressure reducer.
1. Open all of the relevant valves.
2. Check the thermostat or the room thermostat
and, if required, set this.
3. Check the heat generator to see if a fault code
is present.
4. Check and initialise the cylinder.
5. Check the connections for the 2-port motorised
valve.
1. Check the temperature. It must be between 60
and 65 °C.
2. Install a mixer valve.
3. Check the cabling. Repair the cable.
4. Reduce the temperature of the thermostat to
60 °C.
5. Replace the thermostatic valve.
1. Compare the temperature between the con-
trols. The maximum temperature has priority.
2. Set the expansion vessel.
3. Interrupt the power supply to the product and
the heat generator. Check the thermal cut-outs
and replace these in the event of a defect.
1. Reconnect the power supply.
2. Check the plug connection.
1. Check the cable for the cylinder temperature
sensor.
2. Replace the cable harness.
1. Check the electrical connections.
2. Replace the external current anode.
3. Replace the cylinder.
Interval
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Appendix
7