Installation Guide

Maintenance Code Description
1
Protection due to temp. sensor
at water inlet
Open or short circuit of temp sensor at water inlet
10
There is flame signal feedback during pre-check
before applance starts up.
11
Fail to ignite
12
The continous combustion goes off accidentally.
Thermostat is not connected when appliance starts
up.
Thermostat becomes disconnected during normal
combustion.
30
There is air pressure signal feedback during pre-
check before applance starts up.
31
Flue blockage protection is already activated before
appliance starts up.
32
Flue blockage protection becomes activated during
normal combustion.
40
Protection due to fan
Fan is not working; or there is no fan rotating signal.
Revolving speed of the fan ≥600r/min after power
and water supply is on
Turn off the appliance for 45s after operation and
restart water supply; revolving speed of the fan ≥
600r/min
50
Outlet water temp. >80℃ （equal to 176℉）
51
Inlet water temp. >75℃ （equal to 167℉）
60
Protection due to temp. sensor
at water outlet
Open or short circuit of temp sensor at water outlet
42
Protection due to fan revolving
speed
Possible Cause
The possible
cause
information is
just for
reference only.
Please contact
our after-sale
service
immediately in
case of any
malfunction.
Protection due to flame
feedback signal
13
Protection due to thermostat
Protection due to air pressure
Protection due to high temp.