Error Code 76; Error Code 79 - Rheem 862 27 Series Service Instructions Manual

Error Code 76

Communication fault with remote temperature control
Error Code 76
Inspect each of the remote
controls that are fitted to the
appliance and ensure that there is
no duplication of controllers.
Remove all remote control cables
from terminal block on underside
of heater.
Will the unit operate with
remote controls removed?
NO
Replace control PCB.

Error Code 79

Fan Motor Current Fault
Error Code 79
Isolate power, remove the J
connector from the control
PCB and restore power.
Is error code 79
redisplayed?
NO
Isolate power, refit the J
connector to the control PCB
and restore power.
Is error code 79
redisplayed?
TM049 27L Continuous Flow Service Instructions
REV AL – Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled".
Error code 76 will remain if more than 1
type of the same controller is fitted.
YES
YES
YES
NO
Either the wiring or one of the controllers is at
fault. Connect up each controller one at a time
on a new cable to identify the faulty item.
Replace the control PCB.
Replace the fan assembly.
Refer to Error Code 61
procedures.
62