Rheem 862 27 Series Service Instructions Manual page 29

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EZ-Link Fault Finding
EZ Link
Is the complaint for no hot water?
NO
Is the complaint for incorrect
water temperature?
NO
Is the complaint for low or
fluctuating water temperature?
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".
Is the EZ-Link cable firmly plugged into
YES
connector O on both water heaters?
Is dip switch 4 (@DIP1) set to the 'ON'
position on each heater?
*
*
Not applicable
Is a remote temperature controller
to 6 star models
connected to one of the water heaters?
Disconnect the controller, EZ-Link cable
and set dip switch 4 on both heaters to
the 'OFF' position. Do the water heaters
operate individually?
Does physical water temperature match
YES
that shown on remote/s?
Is an error code:
YES 1. Being displayed by the controller, or
2. Stored in the maintenance memory?
NO
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
YES
NO
Connect the EZ-Link wiring correctly.
Isolate power to both units, set dip
switch 4 to the 'ON' position and
restore power.
A controller must be connected to one
of the water heaters for the EZ-Link
system to function.
Fault with controller or EZ-Link Cable.
Replace controller or EZ-Link cable &
reset dip switch 4 to the 'ON' position
on both water heaters.
Water inlet and outlet connections
connected back the front.
Flow rate less than 3 litres/minute/unit.
System functioning correctly.
Incorrect water temperature may be
due to low gas pressure; incorrect
burner pressure setting; faulty or
contaminated thermistor(s).
Conduct fault finding on the water
heater indicated by the controller
display as having a fault (1 or 2) and
based on the error code displayed.
Fluctuating water temperature may be
due to low water supply pressure;
small pipe sizing; incorrect
manifolding; massaging shower
heads; crossed connection; insufficient
gas pressure.
The EZ-Link system is flow rate
dependant. It is normal for only one
heater to operate under low flow
conditions.
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