Rinnai Continuum Series User Manual

REU-2532FFU Series 50 Rinnai
Nature of Fault
Examination Point Diagnostic Values Y/N Action Repair
N
o
.
Yes Go to C-1-2 1. Measure the voltage
between flame rod
terminal C
1
and
appliance ground.
5 ~ 150 VAC
No Replace PCB 32
Yes Go to C-2
1. Check flame rod
2. Check to ensure
flame rod bracket is not
loose.
Is it secure?
No Replace/rectify 33
Yes Check for other
causes of flame
failure.
34
C. Combustion
occurs, but flame
fails.
Error code “12”
Displayed on
digital monitor.
2. Check ground
wire.
Check for faulty ground
wire connections at
unit, receptacle, and
ground rod to home,
and for broken or
shorted wires.
Are connections
OK?
No Replace or repair
grounding circuit
to unit.
35
Yes Go to D – 2 D. Cannot adjust
water
temperature.
1. Check hot water
thermistor.
# Disconnect connector
B
5
and measure the
resistance between
white ~ white. See
diagnostic points on
page #34 for
temperature at various
resistance.
Resistance
values match
table on page
#44.
No Replace water
temperature
thermistor.
36
Yes Go to D-2-2 1. # Disconnect
solenoid connector E
from PCB and measure
the resistance between
brown ~ black.
1.7 ~ 2.1K
Ω
No Replace (SV3) 37
Yes Go to D-3
2. Check
changeover
solenoid valve
(SV3)
2. Measure voltage
between brown ~ black
wire of the changeover
solenoid valve (SV3) at
connector E.
80 ~ 100VDC
No Replace PCB 38
Yes Go to D-3-2 1. #Disconnect
modulating valve at C
2
festoon terminal and
measure resistance at
solenoid terminals.
2 ~ 15
Ω
No Replace
modulating valve
39
Yes Go to D-3-3 2. Measure the voltage
between the two
harness terminals at C
2
.
0.5 ~ 25VDC
No Replace PCB 40
Yes Go to D-4
3. Check modulating
valve.
3. Check whether the
manifold pressure alters
when remote control
temperature is altered
between 96° ~ 140°F.
Does the
manifold
pressure change?
No Replace
modulating valve
(POV)
41
Yes Go to D-4-2
4. Check water flow
servo
1. #Measure resistance
between red ~ blue
wires of the water flow
servo connector B
2
.
22 ~ 26
Ω
No Replace water
flow servo
sensor.
42

Rinnai Continuum Series Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Maximum Water Pressure	150 PSI
Installation	Indoor or Outdoor
Maximum BTU Input	199, 000 BTU/hr
Electrical Requirements	120V
Warranty	5 years parts, 1 year labor