DIAGNOSTIC POINTS

Flow

 

Measurement point

Determination (normal figure)

 

Chart

Component

 

 

Upper : Voltage

 

Remark

CN

Wire Color

 

No.

 

 

 

Lower : Resistance, Current

 

 

 

I

B-Br

AC200

AC240V

 

AC power

 

 

 

 

 

 

 

 

 



GEARED

A1

R-B

DC11

13V

 

 

Drive power

 

MORTOR

 

 

10

30 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-Bk

DC11

13V

 

 

Control power

 

 

 

Y-Bk

Below DC1V(limiter ON)

Full open limiter

 

 

 

 

Below DC4

6V(limiter OFF)

 

 

 

 

Br-Bk

Below DC1V(limiter ON)

Full close limiter

 

 

 

 

Below DC4

6V(limiter OFF)

 



REMOTE CON

E1

Bk-W

DC11

13V

 

 

 

 

TROLS

 

 

 

 

 

 

 

 



WATER FLOW

A2

R-Bk

DC11

13V

 

 

ON2.4L/min

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(35Hz) over 2100

 

 

 

 

 

 

 

 

 

pulse/min.

 

 

 

Y-Bk

DC4

 

7V(pulse 17

400Hz)

OFF1.7L/min

 

 

 

 

 

 

 

 

 

(24Hz) below 1440

 

 

 

 

 

 

 

 

 

pulse/min

 

 

 

 

 

 

 

 

 

 



FAN MOTOR

B1

R-Bk

DC6

 

40V

 

 

More than 1200

 

 

 

Y-Bk

DC11

13V

 

 

pulse/min

 

 

 

W-Bk

DC2

 

10V(pulse 20

400Hz)

 



FLAME ROD

C2

Y-earth

More than DC1 A

 

At ignition

 

 

 

 

 

 

 

 

 

 



HOT WATER

A4

W-W

15

 

11.4

14.0k



Measure Thermis-

 

THERMISTOR

 

 

30

 

6.4

7.8k



tor side (small wire)

 

 

 

 

45

 

3.6

4.5k



 

 

 

 

 

60

 

2.2

2.7k



 

 

 

 

 

105

 

0.6

0.8k



 

 

 

 

 

 

 

 

 

 

 



AIR INTAKE

A3

Y/Bk-Y

15

 

20.1

17.9k



Measure Thermis-

 

THERMISTOR

 

 

30

 

10.2

8.9k



tor side (small wire)

 

 

 

 

45

 

5.5

4.7k



 

 

 

 

 

60

 

3.1

2.6k



 

 

 

 

 

105

 

0.7

0.5k



 

 

 

 

 

 

 

 

 



THERMAL

C3

R-switch

Less than 1



 

 

 

FUSE

A5

 

 

 

 

 

 

 



IGNITOR

G1

Gy-Gy

AC200

240V

 

 

 

 

 

 

 

 

 

 



MAIN SOLE-

F1

P-Bk

DC200

240V

 

 

 

NOID VALVE

 

 

6.0

7.8K



 

 

 

 

 

 

 

 

 

 



SOLENOID

F2

B-Bk

DC200

240V

 

 

 

VALVE 1

 

 

7.8

10.8K



 

 



SOLENOID

F3

Y-Bk

DC200

240V

 

 

 

VALVE 2

 

 

7.8

10.8K



 

 



MODULATING

C1

P-P

DC2

 

15V

 

 

 

 

VALVE

 

 

67

83 

 

 

 

TRANSFORMER VOLTAGES AND RESISTANCES

Connector

Wire Color

Normal Value

 

 

H

W-W

AC200

240V

11

20



D

Or-Or

AC49

55V

1.3

1.7



 

 

 

 

 

 

 

D

B-Br

AC12

14V

0.7

1.3



 

 

 

 

 

 

 

D

Br-Y

AC195

216V

175

215



 

 

 

 

 

 

 

45

Page 45
Image 45
Rinnai REU - 16 FUA - E user manual Diagnostic Points, Mortor

REU - 16 FUA - E specifications

The Rinnai REU-16 FUA-E is a cutting-edge tankless water heater designed for efficiency and convenience. This model is part of Rinnai's renowned line of high-performance appliances, catering to both residential and commercial applications. It boasts a sleek design coupled with advanced technology that sets it apart in the crowded water heating market.

One of the most notable features of the REU-16 FUA-E is its impressive heating capacity. It is capable of delivering hot water on demand, with a maximum output of 16 liters per minute. This means you can comfortably run multiple hot water fixtures simultaneously without experiencing a drop in temperature or flow rate. Whether you’re taking a shower, running the dishwasher, or washing clothes, this unit meets the demand with ease.

The REU-16 FUA-E employs a state-of-the-art condensing technology, which enhances its efficiency by capturing and reusing some of the heat that would otherwise escape through the flue. This allows for an energy efficiency rating of up to 95%, significantly reducing energy bills and environmental impact compared to traditional storage water heaters.

Another key characteristic of this unit is its compact size. The Rinnai REU-16 FUA-E can be installed in smaller spaces, making it an ideal option for apartments, houses, or commercial properties with limited room for bulky tank units. Its flexibility in installation positions—whether indoors or outdoors—provides additional versatility to users.

Safety is also a primary concern with the REU-16 FUA-E. It comes equipped with numerous safety features, including an anti-freezing function, overheat protection, and venting safety controls. These safeguards ensure safe operation for you and your family, providing peace of mind whether it’s running constantly or in standby mode.

In terms of controls, the Rinnai REU-16 FUA-E offers modern digital displays that provide real-time monitoring of water temperature and status. This user-friendly interface makes it easier for homeowners or users to adjust settings according to their preferences.

Overall, the Rinnai REU-16 FUA-E encapsulates innovation and efficiency in water heating. Its combination of advanced technology, high performance, compact design, and safety features makes it a reliable choice for those seeking a consistent supply of hot water without the limitations of traditional systems. Whether for residential use or commercial applications, the REU-16 FUA-E is engineered to provide lasting performance and convenience.