Installation Guide

Installation & Servicing Instructions Rinnai Q-Series

Code Description Solution

contact for return sensor T2

open

Check the data in Error mode. Boiler data during error:

1 Error = 37

2 Operational status = 00

3 Flow temp. = xx*

4 Return temp. = -22

5 kW burner = 00**

6 % pomp = xx*

* = variable values

**= x3415=BTU/hr

Check the wiring. check the wiring for the sensor

The wiring is OK but the error is repeated. Remove the plug from the ﬂ ow

sensor as a result of which Error 32 occurs

Replace the sensor.

Control unit error Software error control unit. Replace the control unit. The display will

automatically load the program into the new control unit.

Control unit error Software error control unit. Replace the control unit. The display will

automatically load the program into the new control unit.

Electrical leakage to ground. Moisture on controller PCB. Check if there is water leaking on or in the

boiler.

Stop water leak and replace controller

No software present Control unit and display don’t have a programm. There are a new display

and a new control unit installed at the same time. Exchange the parts and

the loading will start automatically and

appears on the display.

Ribbon cable problem Replace ribbon cable

Flue gas temperature to high

(adjustment parameter 84 -

default 212°F)

Replace ﬂ ue sensor or adjust parameter 84 to default

Fuse on controller PCB

defective

Cable transformer not

connected

Replace fuse.

A 4A and 5A spare fuse can be found inside the Control Tower just above

the circuit board.