Rinnai Continuum REU2532-W Series User Manual

REU-2532W Series 51 Rinnai
Nature of Fault
Examination Point Diagnostic Point Values Y/N Action Repair
N
o
Yes Go to 4-3 2. Measure voltage
between orange (+) and
grey (-) of the water
flow servo connectorB
2
.
11 ~ 13 VDC
No Replace PCB 43
Yes Go to D-4-4 3. Measure voltage
between brown ~ grey
of water flow servo
connector B
2.
(Do not
turn water on).
4 ~ 6 VDC
No Replace water
flow servo
sensor.
44
Yes Normal
4. Measure voltage
between yellow ~ grey
of the water flow servo
connector B
2.
(Do not
turn water on)
4 ~ 6 VDC
No Replace water
flow servo
sensor.
45
Yes Go to E-1-2 1. #Disconnect
connector F
3
and F
measure resistance
across each of the
heating elements.
(White wires)
348 ~ 375
Ω
No Replace Anti-
frost heater
located in the
water valve.
46
Yes Go to E-2 2. #Read resistance of
the heating element that
is mounted on the front
of the heat exchanger.
(White wires)
100 ~ 110
Ω
No Replace anti-
frost heater that
is defective.
Yes Go to E-2
1. Check anti-frost
heater.
3. Read resistance of
heating elements on the
heat exchanger outlet
hot water line.
33 ~ 39
Ω
No Replace anti-
frost heater that
is defective.
47
Yes Check wiring
E. Anti-frost
heater does not
work.
2. Check frost
sensing switch.
#Disconnect connector
F
2.
and measure across
the frost sensing relay
located on the bottom
left of the casing. This
is a black plastic piece
with two blue white
connected to it. Check
this switch at
temperatures below
37°F. You can place an
ice cube against the
switch to activate it.
Is resistance <1
Ω
after applying ice to
this switch for five
minutes?
No Replace Anti-
frost sensing
switch.
48

Rinnai Continuum REU2532-W Series Specifications

General

Brand	Rinnai
Model	Continuum REU2532-W Series
Category	Water Heater
Language	English