A.O. Smith ATX-199 Instruction Manual page 56

WATER LEAKAGE IS SUSPECTED
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NOTE:
Expansion Closed Water Systems (page 15). The
REPLACEMENT PARTS
GENERAL FAULT AND ALERT CONDITIONS
FAULT CONDITIONS
DIAGNOSTIC CHECKS
Thermal
and Alert Conditions (page 59)
(page 6)
NOTE:
Jumping out control circuits or components can
result in property damage, personal injury or death.
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Service should only be performed by a qualified service
technician using proper test equipment.
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Altering the water heater controls and/or wiring in any way
could result in permanent damage to the controls or water
heater and is not covered under the limited warranty.
56
Electrical Shock Hazard
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Turn off power at the branch circuit
breaker serving the water heater
before performing any service.
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Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
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Verify proper operation after servicing.
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Failure to follow these instructions can
result in personal injury or death.
Water Heating Unit Controller Fault
Any bypass or alteration of the water
heater controls and/or wiring will result
in voiding the appliance warranty.