Ruud AP15318 Use & Care Manual page 28

Error Code Guide:
When an error code is displayed:
G Close the hot water faucet, turn off the switch on the remote
control.
G Wait for about 5 minutes before turning the switch on
again.
G Open the hot water faucet.
If the error code remains in the display:
G Close the hot water faucet and turn off the switch on the
remote control.
G Take the proper action shown below and attempt operation
of the appliance again.
Error Code
11 or 12
15
1L
99
CAUTION: Make certain power to water heater is "OFF" before removing protective cover FOR A NY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. VERIFY PROPER OPERATION A FTER SERVICING.
CAUTION: For your safety, DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other
safety devices. Refer repairs to qualified service personnel.
28
AP15318 tankless 10 30 09.indd 28
Possible Cause
The Gas shutoff valve is not opened fully.
Gas service has been interrupted.
LP Gas is running low. (LP models only).
Air in Gas Line.
Power supply not grounded.
Low inlet gas pressure due to improper sizing
Wrong gas type.
The hot water faucet is not opened enough.
Water heater has build up of lime deposits.
Water heater has buildup of lime deposits.
Decrease of blower motor ventilation volume.
(Operation Stops)
If the error code is still shown:
G Turn off the hot water faucet and turn off the switch on the
remote control.
G Take note of the error code displayed and call the customer
service assistance number in the "If You Need Service"
section of the manual on the back cover.
Notice: If an error code other than those listed below is
displayed, immediately turn off the hot water faucet, take note
of the error code, turn off the switch on the remote control and
call the customer assistance number.
What To Do
Open the Gas shutoff valve fully.
G
Contact gas utility company.
G
Fill up LP Gas container or replace with
G
a new cylinder of LP Gas.
Bleed all air from gas lines.
G
Ensure appliance is properly grounded.
G
Ensure gas line, meter, and regulator are
G
sized properly.
Ensure gas type is correct.
G
Ensure venting is per Use & Care
G
Manual. Contact a dealer for service.
Open the faucet more to secure enough
G
volume.
G Contact a dealer for service.
Contact a dealer for service.
G
Clean any blockage from heat exchanger
G
fins and/or blower motor
11/9/2009 3:17:45 PM