Bryant 180B024, Application Manual And Service Manual

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Residential Air Conditioners and Heat Pumps Using R-22 and Puron® Refrigerant: Application Guideline and Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Status Codes
Table 18 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 18
shows this to be low pressure switch open.
* 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.
Table 17 – Two-Stage Compressor Resistances
(Winding Resistance at 70
_
F
±20
_
)
Winding 024 036 048 060
Start (S-C) 1.64 1.52 1.86 1.63
Run (R-C) 1.30 0.88 0.52 0.39
Table 18 – TROUBLESHOOTING
OPERATION FAULT
AMBER LED
FLASH CODE
POSSIBLE CAUSE AND ACTION
Standby – no call for unit operation None On solid, no flash Normal operation
Low Stage Cool/Heat Operation None 1, pause Normal operation
High Stage Cool/Heat Operation None 2, pause Normal operation
Brown out protection is Disabled None 5, pause User made selection, see instructions for more detail
Brown out protection is Active None 6, Pause User made selection, see instructions for more detail
System Communications
Failure
16
Communication with User Interface lost. Check wiring to User Interface, indoor and
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
or Discharge Temp
Switch Open
31*
High-pressure switch trip. Check refrigerant charge, outdoor fan operation and coils for
airflow restrictions.
Low Pressure Switch
Open
32* Low-pressure switch trip. Check refrigerant charge and indoor air flow.
Control Fault 45 Outdoor unit control board has failed. Control board needs to be replaced.
Brown Out (230 v) 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 47
There is no 230v at the contactor when indoor unit is powered and cooling/heating
demand exists. Verify the disconnect is closed and 230v wiring is connected to the unit.
Outdoor Air Temp
Sensor Fault
53 Outdoor air sensor not reading or out of range. Ohm out sensor and check wiring.
Outdoor Coil
Sensor Fault
55 Coil sensor not reading or out of range. Ohm out sensor and check wiring.
Thermistors out of
range
56
Improper relationship between coil sensor and outdoor air sensor. Ohm out sensors and
check wiring.
Low Stage
Thermal Cutout
71*
Compressor operation detected then disappears while low stage demand exists.
Possible causes are internal compressor overload trip or start relay and capacitor held
in circuit too long (if installed).
High Stage
Thermal Cutout
72*
Compressor operation detected then disappears while high stage demand exists.
Possible causes are internal compressor overload trip or start relay 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
74
Compressor voltage not sensed when compressor should be starting. Contactor may
be stuck open or there is a wiring error.
Low Stage
Thermal Lockout
81
Thermal cutout occurs in three consecutive low/high stage cycles. Low stage locked
out for 4 hours or until 24v power recycled.
High Stage
Thermal Lockout
82
Thermal cutout occurs in three consecutive high/low stage cycles. High stage locked
out for 4 hours or until 24v power recycled.
Low-Pressure Lockout 83
Low pressure switch trip has occurred during 3 consecutive cycles. Unit operation
locked out for 4 hours or until 24v power recycled.
High-Pressure Lockout 84
High pressure switch trip has occurred during 3 consecutive cycles. Unit operation
locked out for 4 hours or until 24v power recycled.