Rinnai Continuum Series User Manual

REU-2532FFU 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 bi-metal sensing
switch located on the
upper right hand of the
heat exchanger. 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 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