Rinnai Continuum Series User Manual

REU-2532FFU Series 45 Rinnai
3) Is the modulating valve operating normally ? Error code 52
a. # Disconnect the modulating valve festoon C
2
terminals and measure the resistance at the
terminals.
Normal: 67 ~ 81 Ω
If normal, check b.
Faulty: Replace modulating valve.
b. Re-connect terminal C
2
and measure voltage
across the pink ~ pink wires when the unit is
firing.
Normal: 2 ~ 15 VDC
If normal, check c below.
Faulty: Replace the PCB unit.
c. Investigate the change in the manifold gas
pressure, when the remote control pre-set
temperature is altered from 96 ~ 140 ºF.
Normal: If the manifold pressure changes,
proceed to check item 4 below. DO NOT
adjust manifold pressures.
Faulty: Replace modulating valve.
4) Is the water flow servo normal ?
a. # Disconnect connector B
2
and measure the
resistance of the water flow servo, red ~ blue
wires.
Normal: 19 ~ 24Ω
If normal, proceed to b.
Faulty: Replace the water flow servo and sensor.
b. Disconnect connector B
2
, and measure the
voltage on the PCB unit side, were the orange
(+), and/or grey or black (-) wires connect to the
board.
Normal: 3.3 ~ 4.5 VDC
If normal, proceed to c.
Faulty: Replace the PCB unit.
c. With connector B
2
, connected (do not turn water
ON … wait for the water flow servo to return to
fully open), measure the voltage at the brown ~
grey wires.
Normal: 4 ~ 6 VDC vent limiter OFF
Faulty: Replace the water flow servo and
sensor.
d. With connector B
2
, connected (do not turn
water ON… wait for the water flow servo to
return to fully open), measure the voltage at the
yellow ~ grey wires.
Normal: Less than 0.5 VDC when unit is set at
120 °F and there is no water flowing through the
unit. .
Faulty: Replace water flow servo and sensor.

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