Rheem Maximus Manual page 41

Troubleshooting Tips
Save time and money! Review the charts on the following pages first and you may not need to call for service.
Problem
Unable to light
the main burner
Main burner does not stay lit
Not enough or no hot water
Water is too hot
CAUTION:
!
Make certain power to the water heater is "OFF" before removing the 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 gas piping, gas control burner, vent connectors or other safety devices. Refer repairs to
qualified service personnel.
NOTE: Training Manual is available through the Technical Services Department for a more detailed troubleshooting and repair
guide.
BEFORE YOU CALL FOR SERVICE...
Possible Cause
Gas control problem
Unit or electrical supply line not properly
grounded
Burner flame not contacting sensor rod.
Unit or electrical supply line not properly
grounded
Water usage exceeded the capacity
Low gas pressure
Water heater set point is set too low
Leaking or open hot water faucets
"ON/OFF" switch turned off
Colder supply water
Burner not staying on
The water heater set point is set too high
What To DO
Contact a qualified service technician.
Verify that the electrical supply line and unit have
proper ground connection.
Call a qualified service technician to review flame
rectification.
Verify the electrical supply line and unit have
proper ground connection.
Wait for the water heater to recover after an
abnormal demand of the water heater.
Check the gas supply pressure.
See the "User Interface" section of this manual to
the set point temperature.
Make sure all faucets are closed.
Turn the switch to the "ON" position.
Incoming water temperature might be lower than
when the unit was initially installed. This will
require a longer heat up cycle.
Refer to the "Main Burner" section of this manual.
See the "User Interface" section of this manual to
the set point temperature.
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