HONEYWELL SV9541M "SMART VALVE" Trouble shooting

The 6 + X designation indicates a combi nation of flash codes: 6 flashes shows the control is in soft lockout, followed by X flashes to indicate

the reason the control went into soft lockout.

Last status code indicates repair to address first

LED

CHECK/REPAIR

INDICATES

STATUS

 

Off

Heartbeat Bright - Dim

2 Flashes

3 Flashes

No power to system control.

Normal indication whenever the system is powered, unless some abnormal event has occurred.

Pressure switches closed when it should be open

(i.e. when call for heat begins),

(Combustion blower is not energized until pressure switches opens)

Pressure switches, open when they should be closed (i.e. longer than 30 seconds alter combustion blower/inducer is energized).

System goes into 5-minute delay period, with combustion blower/ inducer off. At end of the 5-minute delay, another cycle will begin.

Main Limit or Roll Out Switch is open.

Line voltage input at L1 and Neutral connectors on ST9160B Fan Timer. Low voltage (24V) power at 24 VAC and COM terminals on ST9160B System wiring harness is in good condition and securely connected.

Not Applicable - Normal Operation (stand by or call for heat)

Pressure switches stuck closed (system will wait for pressure switch to open).

Pressure switches miswired orjumpered.

Ignition system control switch must be in the ON position. Pressure switches operation, tubing, and wiring. Restrictions in furnace air intake or vent piping.

Main limit switch.

Manual reset burner rollout switch.

4Flashes

5Flashes

6Flashes + I Flash

6Flashes +

2Flashes

Combustion blower is energized, Circulating blower is energized heat speed.

Flame signal sensed out of proper sequence.

Combustion blower is energized, Circulating blower is energized heat speed after the "ON" delay.

Soft Lockout.

Failed to light pilot during 90 sec. trial for ignition

Combustion air blower is de-energized, Circulating blower is de- energized after the "OFF" delay.

After 5-minute delay time, control system will reset and initiate a new ignition sequence,

Soft Lockout.

Last failure was Flame Sense lost during run.

Maximum recycle count exceeded

Combustion air blower is de-energized, Circulating blower is de-energized alter the "OFF" delay.

After 5-minute delay time, control system will reset and initiate a new ignition sequence,

Limit and rollout switch wiring is in good condition and securely connected.

Flame at pilot burner.

Gas supply off or pressure too low or high for appliance to operate. Damaged or broken HSI element

Line voltage HOT lead wire not connected to L1 terminal on ST9160B. Furnace not properly earth grounded.

Flame sense rod contaminated or in incorrect position. Pilot burner located in incorrect position.

Pilot burner lead wires are in good condition and popery connected. Pressure switches operation, tubing, and wiring.

Gas supply off or pressure too low or high for appliance to operate. Line voltage HOT lead wire not connected to L1 terminal on ST9160B. Furnace not properly earth grounded.

Flame sense rod contaminated or in incorrect position. Pilot burner located in incorrect position.

Pilot burner lead wires are in good condition and properly connected.

Cycling, pressure switch

Condensate drain blocked

Pressure switches operation, tubing, and wiring.

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Sears 9MPD100J20B1 manual Honeywell SV9541M Smart Valve Trouble shooting, Flashes Flashes + I Flash, Led, Indicates, Status

9MPD100J20B1, N9MP2100J20B1, 9MPD050F12B1, N9MP1100J20B1, N9MP1125J20B1 specifications

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