Service manual

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6. Igniter error.
If error display 11 appears and there is no continuous
electrical discharge, then check the igniter.
(1) Open the hot-water supply valve and measure
the voltage between White 5 of connector 1 and
Black 2 of connector 10 on the circuit board.
5. Heat exchanger thermistor error.
If error display 33 appears, then check the heat
exchanger thermistor.
(1) Measure the resistance between White 1 and
White 4 of connector Q64.
Break in wire: ∞Ω
Short circuit: 1Ω or less
If wire is broken or short-circuited, replace the
heat exchanger thermistor.
If the problem is not a broken or short-circuited
wire, then inspect/repair the wirings/connectors
of the heat exchanger thermistor.
Normal AC 90 - 110V
Yes Replace the igniter or ignition electrode.
No Replace the circuit board.
4. Water outlet thermistor error.
If error display 32 appears, then check the water
outlet thermistor.
(1) Measure the resistance between White 1 and
White 2 of connector M64.
Break in wire: ∞Ω
Short circuit: 1Ω or less
If wire is broken or short-circuited, replace the
water outlet thermistor.
If the problem is not a broken or short-circuited
wire, then inspect/repair the wirings/connectors
of the water outlet thermistor.