2
Troubleshooting
Envirosun AS Installation Manual Rev1a PVNW.docx
Page 6
2
T
ROUBLESHOOTING
If there is not enough hot water we recommend that the following points are considered
as part of the service call. The most obvious reasons for a lack of hot water could be one
of the following.
2.1
Low solar energy input
If there have been prolonged periods of cloud or winter is approaching, it may be
necessary to reconsider the permitted boosting time for time-clock controlled systems or
to turn on the booster for systems with a booster isolation switch.
2.2
Solar collector shading
Often trees or other buildings can shade the solar collectors or there can be a dirt build-
up on the glass cover. Trees should be cut back if possible or the system relocated if
removal of the shading is not possible in the present location. If the glass is dirty this
should be cleaned with standard domestic glass cleaner. If rainwater collection occurs
from the same roof on which the solar water heater is located, do not use chemical
cleaning agents to clean the collectors. Any spillage of these onto the roof could cause
contamination of water in the rainwater tank.
2.3
AES (Booster) system not operating
For electric systems the fuse or circuit breaker supplying the AES System should be
checked.
If the time clock (where fitted) and the fuse or circuit breaker are operational
and the water is cold, you can turn the booster isolator on and off to see if the electricity
meter speed changes. If there is no change in speed, it indicates there may be a booster
problem. Contact your authorised Conergy dealer or installation service provider as soon
as possible.
For gas systems the gas and electric supplies to the gas heater should be checked to
ensure they are both on. If water temperature from the gas heater is below 70 °C and
both supplies are on and the gas heater does not ignite there may be a problem. Contact
your authorised Conergy dealer or installation service provider as soon as possible.
2.4
Excessive water discharge from the valves
It is normal for the Expansion Control Valve (ECV) to drip water when heating. If there is
a discharge of more than 10 litres per day from any of the systems valves, it indicates
there may be a problem with the valve or an increased water supply pressure. Contact
your authorised Conergy dealer or installation service provider as soon as possible.
2.5
Hot water use higher than anticipated
Often the hot water usage of showers, washing machines and dishwashers is
underestimated by the customer. Review these appliances to determine if the daily
usage is greater than the storage volume of the water heater. Depending on the model
and conditions, our AS system tanks contain 250 to 400 litres of hot water therefore if the
hot water load is greater than the system capacity within a short period of time, there may
be periods where the water temperature is lower than normal. It is also advisable to
inspect hot water tap washers etc. for leakage and replace if necessary.
