Heatrae Sadia R 45 PLUS 3KW, Installation, Operation And Maintenance Manual

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27
Fault / error code Fault Cause of fault Remedy
E3 indicates that the lower
water level sensor is not
indicating water present,
but the upper sensor is
indicating water present
Lower water sensor is
contaminated with scale
build up
Remove and clean sensor
in accordance with section
9.4, page 21
Lower sensor wiring fault
Check wiring connections
at either end of sensor wire
E4 indicates that the
lower water level sensor
is indicating water present
and the upper sensor is
indicating water present
Top water sensor has
shorted
Check wiring at either end
of the sensor wire and at
control board
Solenoid valve is
permanently letting water
through
Replace solenoid
Upper and Lower sensor
wiring fault
Check wiring connections
at either end of sensor
wires
E5 indicates that the
solenoid valve has been
open for more than 20
minutes, during this period
the lower level sensor has
not detected water
No water supply Check water inlet feed
Filter blocked
Check the condition of the
filter in accordance with
section 9, page 21
Solenoid valve is faulty Replace solenoid
There is a fault with the
main control PCB
Replace main control PCB
E6 indicates that the water
heater is taking too long to
heat
Point of use hot tap has
been left open
Shut off the tap
Check that the electronic
cut out has not been
tripped due to a fault
Turn off the water heater
for a minimum of 30 second
and then reapply the power,
this will reset the cut out
Immersion heater is faulty Replace immersion heater
There is a fault with the
main control PCB
Replace main control PCB
Table 10: Error code table

Once the error code has been investigated carry
out the following reset procedure.
`
Turn the power off to the unit at the fuse spur, leave
power off for minimum of 30 seconds, reapply the
power.
`
If the fault has been rectified the unit will re initialise
and then run normally.