Service manual

– 11 –
Total water flow (L/min.)
Approx. 1.6 x 25
K >
+ water inlet temperature (°C)
Set temperature
K
If the inlet temp is less than 50
° C
58
° C Set temp + 10°C
Less than 53°C 53°C or more
or if the following statements
about K are true , the inlet temprature
will be normal (YES).
*1
kW/h
33.3
Out put
Over
18.1
kW/h
ON
Over
11.7
kW/h
6.3
kW/h
Over
2.8
kW/h
Over
Gas solenoid
valve 1
Gas solenoid
valve 2
Gas solenoid
valve 3
ONON
ON
ON
ON ON
ONON
Primary gas solenoid
valve closes
closes
closes
closes
Flame lamp
Gas proportioning valve
Gas solenoid valve 2
Gas solenoid valve 3
goes off
Gas solenoid valve 1
closes
Shutdown procedure
Hot water tap CLOSED
YES
NO
Fan motor post purge
Main flow control
valve opens fully
Fan motor stops
since hot water fixture
Has 6min. passed
closed
YES
NO
Heat
exchanger thermistor
< 40°C
NO
Water flow sensor detects
< 2.0 L/min.
valve closes
Bypass flow control
*2
Over
*3 When the present fan speed is 500rpm more or less than target speed.