Bryant R-22 service manual Status Codes, Troubleshooting

Status Codes

Table 17 shows the status codes flashed by the amber status light. Most system problems can be diagnosed by reading the status code as flashed by the amber status light on the control board.

The codes are flashed by a series of short and long flashes of the status light. The short flashes indicate the first digit in the status code, followed by long flashes indicating the second digit of the error code.

The short flash is 0.25 seconds ON and the long flash is 1.0 second ON. Time between flashes is 0.25 seconds. Time between short flash and first long flash is 1.0 second. Time between code repeating is 2.5 seconds with LED OFF.

EXAMPLE:

3 short flashes followed by 2 long flashes indicates a 32 code. Table 17 shows this to be low pressure switch open.

Table 17—TROUBLESHOOTING

OPERATION		AMBER
	FAULT	LED FLASH	POSSIBLE CAUSE AND ACTION
		CODE
Standby – no call for unit opera-	None	On solid,	Normal operation
tion		no flash
Emergency Mode --- Model	Standard Thermostat	Rapid,	Unit being controlled by standard thermostat inputs instead of Evolution
288A/180ANA with serial number	Control	continuous	Control. Only high stage operation is available. This operating mode should
3709 and prior.	(288A/180ANA only)	flashing	be used in emergency situations only.
Low Stage Cool/Heat Operation	None	1, pause	Normal operation
High Stage Cool/Heat Operation	None	2, pause	Normal operation
	System Communica-	16	Communication with User Interface lost. Check wiring to UI, indoor and
	tions Failure		outdoor units
	Invalid Model Plug	25	Control does not detect a model plug or detects an invalid model plug. Unit
			will not operate without correct model plug.
	High Pressure Switch	31*	High ---pressure switch trip. Check refrigerant charge, outdoor fan operation
	Open		and coils for airflow restrictions.
	Low Pressure Switch	32*	Low---pressure switch trip. Check refrigerant charge and indoor air flow.
	Open
	Control Fault	45	Outdoor unit control board has failed. Control board needs to be replaced.
	Brown Out (230v)	46	Line voltage < 187v for at least 4 seconds. Compressor and fan operation
			not allowed until voltage>190v. Verify line voltage.
	No 230v at Unit		There is no 230v at the contactor when indoor unit is powered and cooling/
	Measured at L1 and	47	heating demand exists. Verify the disconnect is closed and 230v wiring is
	L2 on circuit board		connected to the unit.
	Outdoor Air Temp	53	Outdoor air sensor not reading or out of range. Ohm out sensor and check
	Sensor Fault		wiring.
	Outdoor Coil	55	Coil sensor not reading or out of range. Ohm out sensor and check wiring.
	Sensor Fault
	Thermistors out of	56	Improper relationship between coil sensor and outdoor air sensor. Ohm out
	range		sensors and check wiring.
	Low Stage		Compressor operation detected then disappears while low stage demand
		71*	exists. Possible causes are internal compressor overload trip or start relay
	Thermal Cutout
			and capacitor held in circuit too long (if installed).
	High Stage		Compressor operation detected then disappears while high stage demand
		72*	exists. Possible causes are internal compressor overload trip or start relay
	Thermal Cutout
			and capacitor held in circuit too long (if installed).
	Contactor Shorted	73*	Compressor voltage sensed when no demand for compressor operation
			exists. Contactor may be stuck closed or there is a wiring error.
	No 230V at		Compressor voltage not sensed when compressor should be starting. Con-
	Compressor (288A	74
			tactor may be stuck open or there is a wiring error.
	Only)
	Low Stage Did Not		Specified start voltage at VR terminal was not achieved in low stage. Start
	Start	75
			relay was de---energized after 1 second.
	(286A Only)
	Low Stage Did Not		For 3 consecutive low stage starts, the specified start voltage at VR terminal
	Start 3 times	76	was not achieved & start relay was de---energized. Low stage locked out for
	(286AOnly)		30 minutes.
	High Stage Did Not		Specified start voltage at VS terminal was not achieved in high stage. Start
	Start	77
			relay was de---energized after 1 second.
	(286A Only)
	High Stage Did Not		For 3 consecutive high stage starts, the specified start voltage at VS terminal
	Start 3 times (286A	78	was not achieved & start relay was de---energized. High stage locked out for
	Only)		30 minutes.
	Low Stage	81	Thermal cutout occurs in three consecutive low/high stage cycles. Low
	Thermal Lockout		stage locked out for 4 hours or until 24v power recycled.
	High Stage	82	Thermal cutout occurs in three consecutive high/low stage cycles. High
	Thermal Lockout		stage locked out for 4 hours or until 24v power recycled.
	Low---Pressure Lock-	83	Low pressure switch trip has occurred during 3 consecutive cycles. Unit
	out		operation locked out for 4 hours or until 24v power recycled.
	High ---Pressure	84	High pressure switch trip has occurred during 3 consecutive cycles. Unit
	Lockout		operation locked out for 4 hours or until 24v power recycled.
	Low Contactor Open	85	Compressor voltage not sensed when compressor should be starting. Low
	(286A Only)		stage contactor may be stuck open or there is a wiring error.
	High Contactor Open	87	Compressor voltage not sensed when compressor should be starting. High
	(286A Only)		stage contactor may be stuck open or there is a wiring error.

*Sequence: Compressor contactor is de---energized and outdoor fan is energized for up to 15 minutes. If demand still exists, control will energize compressor contactor after 15 minute delay. If fault is cleared, unit will resume operation. If fault still exists, fan shuts off, and error code continues to flash. Control will attempt re---start every 15 minutes. Cycling low voltage defeats the 15 minute delay.

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