|
|
|
| FORM | |
|
|
|
|
|
|
|
|
|
|
| |
| Status LED | Status LED Description |
| Status LED Troubleshooting Information | |
Green “POWER” | Module has power | Supply voltage is present at module terminals | |||
|
|
|
| ||
Red “TRIP” LED | Thermostat demand signal Y | 1. | Compressor protector is open | ||
| On Solid | is present, but the |
|
|
|
|
| compressor is not running | 2. | Condensing unit power disconnect is open | |
|
|
|
|
| |
|
|
| 3. | Compressor circuit breaker or fuse(s) is open | |
|
|
|
|
| |
|
|
| 4. | Broken supply wires or connector is not making contact | |
|
|
|
|
| |
|
|
| 5. | Compressor power wires not routed | |
|
|
|
| through Comfort Alert | |
|
|
| 6. | Compressor contactor has failed open | |
|
|
|
|
|
|
Red “TRIP” LED
Flashing
Module locks out compressor when compressor damaging ALERT codes appear. Lockout ALERT codes are noted in the Status LED Description.
During a compressor lock out, 24VAC power must be removed from module to manually reset
Yellow "ALERT" | A short circuit or over current | 1. | Compressor contactor coil shorted. | ||
| LED On Solid | condition exists on PROT |
|
|
|
|
| terminal. |
|
|
|
|
| 2. | Electrical load too high for PROT circuit | ||
|
|
| |||
|
|
|
| (maximum 1 Amp) | |
|
|
|
|
|
|
|
|
| 3. | 24 VAC wired directly to PROT terminal | |
|
|
|
|
|
|
Yellow “ALERT” | System Pressure Trip | 1. | High head pressure | ||
| Flash Code 2 | Discharge pressure out of |
|
|
|
|
| limits or compressor over- | 2. | Condenser coil poor air circulation (dirty, | |
|
| loaded (if no high pressure |
| blocked, damaged) | |
|
| switch in system) | 3. | Condenser fan is not running | |
|
| LOCKOUT |
|
|
|
|
|
| 4. | If low pressure switch is open: | |
|
|
|
| Refer to Code 3 for troubleshooting | |
Yellow “ALERT” | Short Cycling | 1. | If low pressure switch is open: | ||
| Flash Code 3 | Compressor is running only | a. Low refrigerant charge | ||
|
| briefly?y LOCKOUT | b. Evaporator blower is not running | ||
|
|
| c. Evaporator coil is frozen | ||
|
|
| d. Faulty metering device | ||
|
|
| e. Condenser coil is dirty | ||
|
|
|
| f. Liquid line restriction (filter(?drier | |
|
|
|
| blocked if present) | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Johnson Controls | 19 |
