Gas Conversion - Rinnai Continuum Series Service Manual

23. ELECTRICAL COMPONENT ANALYSIS
Nature of Fault Examination Point
A. The LED on 1. Do you have
the remote voltage to the unit?
control does not
light up, when
the system is
2. Is supply voltage
powered up
correct?
3. Check surge
protector.
4. Check 3 amp
electrical fuses.
5. Check for short
circuits.
6. Check to ensure
you have 120 VAC
across both terminals
feeding the surge
protector.
REU-2532FFU Series
Diagnostic Point
Inspect visually
Measure voltage at power
point.
Inspect visually
# Disconnect and measure
resistance to confirm if
fuse is blown. Normal <
than 1MΩ
1. Measure resistance of
each solenoid valve.
# Remove connector E
from the PCB before
measuring .
Pink ~ Black (SV0)
1.7 ~ 2.1KΩ
Yellow ~ Black (SV1)
1.7 ~ 2.1KΩ
Brown ~ Black (SV2)
1.7 ~ 2.1KΩ
1. Measure the
resistance.
# Disconnect sparker
connector F and measure
8
the resistance between both
terminals.
3. Check wiring.
1. Measure voltage at the
blue and brown wires.
47
Values Y/N
Do you have 120 VAC Yes
at the power supply?
No
120 VAC Yes
No
Do you have 120 volts Yes
AC across the blue
and brown wires at the No
surge protector?
Is fuse blown. Yes
No
Are valves within Yes
those specified at left?
# Measure after
checking that there are
no broken wires or
shorts.
No
Is resistance >1MΩ ? Yes
No
Are there any shorts ? Yes
No
100 ~ 120 VAC Yes
No
Action Repair
o
N
Go to A – (2)
Plug in cord 1
Go to A – (3)
Check power 2
supply circuit.
Check fuses.
Go to A – (4)
Go to A – (5)
Go to A – (5)
and replace
fuse.
Go to A – (6)
Go to A – (6) -
2
Replace faulty 3
solenoid
valves.
Go to A (5-3) 4
Replace
sparker.
Rectify/ 5
Replace
Replace PCB 6
Go to A (6-2)
Check for
proper voltage
to unit.
Rinnai