8 | Rinnai Smart Cylinder MP indoor stainless steel: Owner & installer guide: 20430-C 03-17
Troubleshooting
Do not attempt to carry out any work other than that mentioned in this
troubleshooting section. If you have any other faults or problems, please contact
your installer, or contact Rinnai.
Problem
Recommended action
Error code is
flashing on the
controller
Error codes are indicated by the maintenance logo, a flashing
background light, and the error code number.
Take a note of the error code and phone Rinnai Customer Services
(0800 746 624) for advice on whether a plumber or electrician is
required.
No display on the
controller, but
power is on and
you have hot water
Call Rinnai Customer Services (0800 746 624).
Nothing happens
when the buttons
are pressed
Check if the child lock is set. Unlock by pressing the mode and -
buttons at the same time for more than three seconds.
I have cold
water while in iQ
automatic mode
A sudden significant increase of hot water consumption may
generate occasional cold water. Change to manual mode and select
the desired temperature level and then go back to iQ mode.
If this occurs regularly, increase the level in iQ mode or occasionally
go into manual mode.
Lack of hot water
or no hot water
Is there electricity supply to the cylinder?
Check that the isolating switch marked ‘hot water’ or ‘water heater’,
at the meter box, is switched on. Also check any isolating switches
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 the fuse or tripping of
the circuit breaker indicates a fault, which must be investigated by
an authorised tradesperson.
Most hot water cylinders are controlled at peak times by your
electricity supplier via a ripple relay. Contact your electricity supplier
to determine if there have been any issues with the power supply.
