- 7 -
Hold
for
3
seconds
to
switch
Celsius
(
℃
)
and
Fahrenheit
(
℉
)
6.
Trouble
shooting
6.1
Error
code
on
the
LED
controller
Malfunction
Code
Reason
Solution
Water
temperature
sensor
failure
P1
Water
temperature
sensor
open
circuit
or
short
circuit.
1.
Check
the
sensor
wiring.
2.Replace
the
new
water
temperature
sensor.
Piping
temperature
sensor
failure
P3
Piping
temperature
sensor
open
circuit
or
short
circuit.
1.
Check
the
sensor
wiring.
2.Replace
the
new
piping
temperature
sensor.
Ambient
temperature
sensor
failure
P5
Ambient
temperature
sensor
open
circuit
or
short
circuit.
1.
Check
the
sensor
wiring.
2.Replace
the
new
water
temperature
sensor.
Too
low
or
too
high
ambient
temperature
protection
E0
1.
Ambient
temperature
is
out
of
operating
range:
23°F~109.4°F.
2.
Controller
failure.
1.
Wait
the
ambient
temperature
recover
the
operation
range.
2.
Replace
the
new
controller.
Water
flow
failure
E3
1.
Insufficient
or
no
water
flow.
2.
The
wiring
for
water
flow
switch
is
in
loose
situation.
3.
Malfunction
of
water
flow
switch
1.
Check
the
water
pump
or
water
piping
system.
2.
Check
the
wiring
of
water
flow
switch.
3.
Replace
a
new
water
flow
switch
