Rinnai new Zealand Limited
Hotflo Electric Storage Water Heater
Operation and Installation: 11151-C 03-10
10
Troubleshooting
Lack of hot water or no hot water
Is there electricity supply to the water heater?
Check that the isolating switch marked ‘Hot Water’ or ‘Water Heater’ at the meter box is
switched on. Check also any isolating switches installed near the water heater are switched on.
Check the fuse or circuit breaker marked ‘Hot Water’ or ‘Water Heater’ at the meter box.
Repeated failure of fuse or tripping of circuit breaker indicates a fault which must be
investigated by an authorised trades person.
Most water heaters are controlled at peak times by your electricity supplier via a ripple relay.
Contact your electricity supplier to determine if there have been issues with power supply.
Are you using more hot water than you think?
Often you don’t realise how much water is actually being used. This applies especially when
showering. Typical flow rates for showers is around 8-10 litres per minute. Conduct a simple
experiment by placing a measured bucket under your shower for 10 seconds and multiply by 6
to obtain the amount of water produced over a minute.
If your result is significantly more than the rates above you may want to consider installing a
low flow shower rose available at all good plumbing outlets.
Cold Water Relief Valve discharging continuously?
It is normal for the Cold Water Relief Valve to discharge a small quantity of water through the
drain line. If water is discharging continuously there may be a fault with one of the valves,
contact your installer to discuss.
High electricity bills
If you think your electricity bill is too high, investigate the following:
• There may have been change to your electricity tariff since your last bill
• Cold Water Relief Valve is discharging continuously, refer above
• you may be using more hot water than you think, refer above for further details
• There may be hot water pipe/tap leakages, have these checked by your local plumber
Servicing and repair
If any electrical component of the system is damaged, it must be replaced by an
authorised person. These components must be a genuine replacement part available
from Rinnai.
If the system needs servicing or should a problem occur, please call 0800 RInnaI
(0800 746 624) from a land line and selection option one for a service centre in your area.
Service calls relating to any condition or fault not related to the Rinnai Hotflo Electric Storage
Water Heater and its components may be charged.
do not attempt to carry out any service work other than that mentioned in the troubleshooting
pages.
