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 | 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 | |
| Open | and coils for airflow restrictions. | ||
|
| |||
|
|
|
| |
| Low Pressure Switch | 32* | ||
| 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 | |||
| (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 | |
| (286AOnly) |
| 30 minutes. | |
|
|
|
| |
| High Stage Did Not |
| Specified start voltage at VS terminal was not achieved in high stage. Start | |
| Start | 77 | ||
| relay was | |||
| (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 | |
| 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. | ||
|
| |||
|
|
|
| |
| 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 | 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
54