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8 716 473 071 (2015/04) HydroPower
16 | Troubleshooting
8Troubleshooting
8.1 Problem/cause/solution
Assembly, maintenance, and repairs must be performed by qualified technicians only. The following chart offers possible solutions
to problems.
In most instances it is advisable to have a technician attend and inspect the appliance.
Some further trouble shooting advice may be found at http://www.bosch-climate.com.au
Problem Cause Solution
Fluctuation in hot water temperature. Insufficient flow through the hot water
unit.
Tapware does not give sufficient flow
(section 2.5, Low Flow Rates).
Increase water flow by opening multiple
hot taps.
If fluctuation ceases then check for
blockages, aerators dirty etc.
Change tapware to meet requirements.
Unit not working. (No Hot Water). Locked out due to failure to ignite.
The ignition will lock out after 20 seconds
if a flame is not established.
Turn off all hot water taps and retry.
If unit still does not work - isolate valves at
unit for 20 seconds. Open valves and
retry.
If unit still fails to ignite refer to qualified
technician.
Unit not working after change in Gas
Supply (Maintenance work on Mains or
change of LPG cylinders).
Air in gas lines. Turn on hot water tap inside house.
Isolate water valve at unit for 20 seconds.
Open valve and check if unit lights.
Repeat this operation 3-4 times, if unit
still fails to ignite call your Gas Retailer or
a qualified technician.
Not hot enough. Insufficient Natural Gas supply.
Consumer gas and water controls.
Gas Cylinders may be empty / undersized
(45kg cylinders recommended for LPG).
Requires a service technician to inspect
and test gas supply pressures /
recommission.
Adjust gas and water controls.
Smell of gas. Gas leak. Isolate Gas supply to hot water unit/
premises.
Call your Gas Retailer or a qualified
technician.
Temperature too hot in Summer. Incoming water temperature has
increased with the ambient temperature
and Gas control is on hot position (Fully
right).
Adjust Water and Gas controls at the unit
to achieve desired temperature.
Temperature too cold in Winter. Incoming water temperature has
decreased with the ambient
temperature.Gas control is on warm
position (Fully Left).
Adjust Water and Gas controls at the unit
to achieve desired temperature.
Table 10
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