SVC 810 Tankless Troubleshooting Manual
40
Troubleshooting
• When measuring resistance of a part, turn off the electric power and be sure to
disconnect the part completely before measuring (from connector or terminal).
Resistance checks are performed on the part while it is disconnected from the control
board.
• Electrical checks are performed with the connectors in place and the unit turned on.
(Indoor Model Only) When performing maintenance and/or servicing the water heater
without front cover, push the air filter switch down. Without pushing it down, Error Code
[21] is displayed.
• All Molex connections only go to one location and fit one way. You do not need to
force a connection. Connections are also color coded to aid in reassembly.
• CAUTION When performing maintenance and/or servicing the water heater, turn off
the electric power, gas shutoff valve and water shutoff valve. Wait for the water heater to
become cool. Be careful to avoid injury on the sharp edges.
• WARNING Shock hazard - line voltage is present. Before servicing the water heater,
turn off the electric power to the water heater at the main disconnect or circuit breaker.
Failure to do so could result in severe personal injury or death.
Troubleshooting Format and Example
Yes
No Yes
If you are not familiar with this format, I will ask
you a series of questions – one question at a time.
You must perform the service check and work thru
the tree based on the Yes or No result of the test.
Does this make sense to you?
This template is used
to troubleshoot error
codes to determine
faulty parts.
Are you familiar with
this format?
No
Good. Proceed to your error code to resolve the
issue. The error codes are listed in the table of
contents.
You are welcome to call our technical
service center at 1-800-432-8373. We
will walk you thru your first error code.
Please have a multimeter with you when
you call. We will not be able to resolve
the error codes on this machine without
a multimeter capable of measuring AC
voltage, DC voltage and OHMS
resistance.
In some cases you will be
asked to perform a test. That
test is contained in a box that
looks like this.
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