Appendix; A Eliminating Faults; B Troubleshooting - Glow-worm Compact 28c-AS/1 Operating Instructions Manual

Appendix

A Eliminating faults

Code/meaning
F.22
System pressure too
low
F.28
Ignition unsuccessful

B Troubleshooting

Symptom
Product does not start
up (no hot water,
heating remains cold)
Heating will not start
(hot water generation
OK)
12
Possible cause
Water deficiency in
the heating installation
After three unsuc-
cessful ignition at-
tempts, the product
has switched to fault
mode.
Possible cause
The installation's gas
stopcock and/or the
gas stopcock on the
product is closed.
The gas supply is
interrupted.
The power supply in
the building is discon-
nected.
The cold-water stop-
cock is closed.
The product is
switched off.
The room temper-
ature/domestic hot
water temperature
has been set too
low and/or heating
mode/domestic hot
water mode has been
switched off.
There is air in the
heating installation.
The external control
has not been paramet-
rised correctly.
Measure
1. Check the filling pressure of the heating
installation. (→ Page 9)
2. Fill the heating installation. (→ Page 9)
1. Check whether the gas stopcock is open.
2. Eliminate faults in the product.
(→ Page 10)
3. Check at the gas meter that gas is still
being supplied to the product.
◁
If you have not topped up your payment
recently, the gas supply could be cut off
by the meter.
4. If you are unable to eliminate the ignition
fault, contact a competent person.
Measure
▶
Open both gas stopcocks.
▶
Arrange payment by the appropriate means
to ensure that your gas supply is restored.
▶
Check the fuse in the building. The product
automatically switches back on when the
power supply is restored.
▶
Open the cold-water stopcock.
▶
Eliminate faults in the product. (→ Page 10)
1. Set the room temperature.
2. Set the domestic hot water temperature.
(→ Page 8)
▶
Inform a competent person in order to have
the heating installation purged.
▶
Set the external control correctly (→Control
operating instructions).
Operating instructions Compact 0020313974_00