Rheem 874W27NF User Manual

26
TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
NO ERROR CODE FAULT FINDING
1y = Water flow
detected by water
flow sensor
NO
Read
maintenance
information 1y
YES
NO
Replace the PCB assembly.NO
YES
YES
Replace the water flow sensor.
NO
YES
874W Series models are not
suitable for use as in-series gas
boosters.
NO
Free the flow sensor turbine.YES
Is the unit used as
an in-series gas
booster?
Is 1y displaying a
flow greater than
2lpm?
Is the voltage
between terminals 2
& 3 at connector S
normal?
Test 5
Is the voltage
between terminals 1
& 2 at connector S
normal?
Test 6
Is the flow sensor
turbine jammed?
Test 7
Is water flow
through unit greater
than 2lpm?
Open hot tap further/clear
strainer.
NO
Replace the PCB assembly.
YES

Rheem 874W27NF Specifications

General

Brand	Rheem
Model	874W27NF
Category	Water Heater
Language	English