Rinnai REU-2007W Service Manual page 46

9) Are the safety devices operating normally?
1) Is the flame rod functioning normally?
2) Is the earth lead wire normal?
Infinity REU-2007,2008,2408,2424
Check the thermal fuse.
a. # Disconnect connector B
b. Measure resistance between the two
Combustion stops due to flame failure
a. Measure the voltage between the flame
b. Check that the flame rod attachment is not
a. Check whether the earth lead wire has
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the resistance between red ~ red.
Ω
Normal: less than 1
If normal, replace the PCB unit.
Faulty: Check the appliance for damage.
If there is nothing abnormal, replace the
thermal fuse.
Check the remaining flame safety device.
terminals B .
3
Ω
Normal: less than 1
If normal, replace the PCB unit.
Faulty: Replace the remaining flame safety
device.
rod terminal (A ) and the appliance earth.
2
Normal: AC 100 ~ 160V
If normal, check (b) below.
Faulty: Replace the PCB unit.
loose.
Normal: Replace the PCB unit
Faulty: Secure the flame rod brackets.
come loose (disconnection from round
terminal) or if any shorts have occurred.
If normal, check for any other causes for
flame failure (eg. gas valve is open,
blocked filter, etc)
Faulty: Secure the earth.
and measure
2
.
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