Troubleshooting Tips; Before You Call For Service - Paloma Tankless Water Heater Installation And Operating Instruction Manual

Before You Call For Service...

Troubleshooting Tips

Save time and money! Review the charts on the following pages first and you may not need to call for service.
Problem
Not enough or no hot water.
Water not hot enough.
Water too hot.
Fan continues to rotate after hot water
faucet is closed.
CAUTION: Make certain power to water heater is "OFF" before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
CAUTION: For your safety DO NOT attempt repair of electrical wiring, gas piping, remote control, burners, vent
connectors or other safety devices. Refer repairs to qualified service personnel.
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Possible Cause
Water Shutoff valve is not fully
opened.
Hot water faucet is not fully opened.
Water piping is frozen.
No electricity or water supply is cut
off.
Unit is not "ON".
The temperature may be set too low.
Mixing Valve Malfunctions
(if applicable)
Error code displayed on remote
controller.
Not enough water demand.
Water inlet filter clogged.
Fixture aerator is clogged.
Scale build up in heat exchanger.
Hot and cold water lines reversed.
The temperature may be set too low.
The gas valve is not fully opened.
Gas supply pressure is low.
Bleed over in one of the hot water
fixtures.
Temperature is set too high.
Water shutoff valve is not fully
opened.
Small amount of water has been
heated.
This function is to supply hot water
when the hot water faucet is reopened.
What To Do
l
Check shutoff valve and open fully.
l
Open how water faucet completely.
(The main burner goes off when
incoming water volume is
l
Allow piping to thaw.
l
Check that proper power is being
supplied and/or water supply is
adequate.
l
Turn the unit "ON" by the button
l
Check and replace if necessary.
l
See instructions for Error Code and
if required, contact a dealer for
l
Clean aerator.
l
Check for error code. If required,
l
Check and open the gas valve fully.
l
Call your gas company to verify
the gas meter and gas piping size.
l
Call dealer for service.
l
Decrease the temperature setting.
l
Allow more water to flow.
l
Normal operation. There is no need
to call for service.
l
Normal operation. There is no