Bryant 333BAV Continuous OFF, Continuous on, Rapid Flashing, Secondary Voltage Fuse is Open

WARNING

Service should be performed only by qualified persons.

SERVICE

If status code recall is needed, do not remove power or blower door.

LED CODE	STATUS
CONTINUOUS OFF	Check for 115V at L1 and L2, and 24V at SEC1 and SEC2.
CONTINUOUS ON	Control has 24V power.
RAPID FLASHING	Line voltage polarity reversed. If twinned, 24V power
	to one furnace may be out of phase with power to other furnace.

EACH OF THE FOLLOWING STATUS CODES IS A TWO-DIGIT NUMBER WITH

THE FIRST DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND

THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES.

11NO PREVIOUS CODE - Stored status codes are erased when power (115V or 24V) to control is interrupted or 48 hours after each fault is cleared.

12BLOWER ON AFTER POWER UP - Blower runs for 90 seconds, if unit is powered up during a call for heat (R-W/W1 closed). Note: 2-sec. ON-delay.

13LIMIT OR FLAME ROLL-OUT (FRS) SWITCH LOCKOUT - Auto-reset after three hours. FRS switch requires manual-reset.

Check for: - Refer to #33

14IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.

21GAS HEATING LOCKOUT - Control will NOT auto-reset.

Check for: - Mis-wired gas valve- Defective control (valve relay)

22 ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is

de-energized. Inducer will run until fault is cleared.

Check for: - Leaky gas valve - Stuck-open gas valve

23LOW- OR HIGH-HEAT PRESSURE SWITCH DID NOT OPEN Check for: - Obstructed pressure tubing

-Defective pressure switch (stuck closed)

24SECONDARY VOLTAGE FUSE IS OPEN

Check for: - Short-circuit in secondary voltage (24V) wiring

31HIGH-HEAT PRESSURE SWITCH OR RELAY DID NOT CLOSE OR REOPENED

Check for: -Control relay may be defective - Refer to #32

32LOW-HEAT PRESSURE, DRAFT SAFEGUARD , OR AUX-LIMIT (DOWNFLOW ONLY*) SWITCH DID NOT CLOSE OR REOPENED Check for: - Proper vent sizing (and condensate pitch with side-wall vent)

- Low inducer voltage (115v)	* Blower motor and capacitor
- Defective inducer motor	- Defective pressure switch
- Excessive wind	- Restricted vent

-Inadequate combustion air supply

-Disconnected or obstructed pressure tubing

33 LIMIT OR FLAME ROLL-OUT (FRS) SWITCH IS OPEN - FRS switch

requires manual-reset.

Check for: - Inadequate combustion air supply (FRS switch only)

- Dirty filter or restricted duct system	- Loose blower wheel
- Defective switch or connections
- Blower motor or capacitor failure

34IGNITION-PROVING FAULT - Control will retry three times before lockout #14. Check for: - Oxide buildup on flame-proving sensor (clean with fine sandpaper).

-Proper flame-proving microamps (0.5 minimum)

-Proper control ground continuity

-Flame-proving sensor must be ungrounded

- Smooth flame carryover and ignition - Manual valve(s) OFF

43LOW-HEAT PRESSURE, DRAFT SAFEGUARD, OR AUXILIARY LIMIT SWITCH OPEN WHILE HIGH-HEAT PRESSURE SWITCH IS CLOSED Check for: - Disconnected or obstructed pressure tubing

-Defective pressure switch (stuck open)

-Refer to #32 and #33

45 REPLACE CONTROL

320893-101 REV. A

A94169

Fig. 10ÐService Label

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