Rinnai Continuum REU2532-W Series, Service Manual

Page: 47 / 72

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