Blower Prover Open; Blocked Air Intake - State Water Heaters SUF-130- 300/400/500 Instruction Manual

State water heaters water heater user manual

Table of Contents

fault and alert messages (cont)

Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualified service agent

in your area.

possible causes - check/repair

• The control system has detected the Blower Prover Switch

contacts are closed when they should be open at the beginning of

a heating cycle - see the Sequence Of Operation on page 59.

• Pinched/shorted Blower Prover Switch wiring - see Figure 3 on

page 59 for switch location.

• Jumper wire connected to the Blower Prover Switch - remove

jumper wire. Jumper wires must never be used, read all Warnings

on page 59.

• Excessive wind outdoors pressurizing the vent system piping.

• Excessive negative air pressure in the installed space.

• The control system has detected the Blower Prover Switch

contacts are remaining open after the control system has

energized the Combustion Blower - see the Sequence Of

Operation on page 59.

• Loose or open wiring to the Blower Prover Switch - see Figure 3 on

page 59 for switch location.

• Blower Prover Switch air sensing tube disconnected, kinked, filed

with condensate, damaged or leaking - repair or replace tube.

• Combustion Blower is not running when energized.

• Loose or open wiring to Combustion Blower.

• Loose, open, incorrect wiring to the VFD on SUF 130 400 and

SUF 130 500 models - see Figure 3 on page 59 and the wiring

diagram on page 59.

• The control system has detected the Blocked intake Air Switch

contacts are open.

• Loose or open wiring to the Blocked intake Air Switch - see Figure

3 on page 59 for switch location.

• Excessive equivalent pipe length, exceeded the maximum number

of 90° elbows or wrong pipe size used in the intake air piping

system - see Venting requirements on page 59.

• Balance plate and/or intake air screen was not removed prior to

connecting the intake air piping to the water heater and is clogged/

blocked with debris - see Figure 17 on page 59.

• Excessive negative air pressure in the installed space.

• The control system has detected the ECO (energy cut out) Switch

contacts are open.

• The ECO switch is a normally closed switch that opens on a

temperature rise to prevent excessive water temperature in the

storage tank. The ECO switch is inside the Upper Temperature

Probe (two red wires) - see Figure 3 on page 59 for Upper Probe

location.

• Loose or open wiring to the ECO switch in the Upper Temperature

Probe - two red wires.

• improper water system piping and/or excessively high return

(recirculation) loop water temperature - see the Water Piping

Diagrams beginning on page 59.

• The control system has not detected any voltage from the powered

anode rods - see Figure 3 on page 59 for location.

• No water in the storage tank.

• Loose or open wiring connections to the powered anode rods - see

Figure 3 on page 59 for location.

• Powered anode rod wiring shorted to ground.

• The water heater is not properly grounded - see Power Supply

Connections on page 59.

• Loose or open ground wires.

• Top fitting (3/4 inch bushing) of the powered anode rods were

saturated with water during installation - with power to the water

heater turned off, carefully remove anode rods and dry out

bushing(s).

displayed fault/alert message

Blower Prover Failure

The blower prover switch is

closed out of sequence.

Call a service professional:

Your Company Name Here

(press [DOWN] for more....)

CHANGE