INSTALLATION INSTRUCTIONS |
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Figure 16 | Comfort Alertt Diagnostics (some models) | ||
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 | 1. Compressor protector is open | |
On Solid | Y1 is present, but the | 2. Outdoor unit power disconnect is open | |
| compressor is not running | 3. | Compressor circuit breaker or fuse(s) is open |
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| 4. | Broken wire or connector is not making contact |
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| 5. | Compressor power wires not routed through Comfort Alert |
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| 6. | Compressor contactor has failed open |
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Red “TRIP” | The | minutes), in module is preventing compressor restart. | |
LED Flashing |
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Module locks out compressor when compressor damaging ALERT codes appear. Lockout ALERT codes are noted in the Status LED Description; during a compressor lockout, 24VAC power must be removed from module to manually reset.
Yellow “ALERT” | A short circuit or over | 1. | Compressor contact coil shorted |
LED On Solid | current condition exists on | 2. | Electrical load too high for PROT circuit (maximum) 1 amp |
| PROT terminal | 3. | 24 VAC wired directly to PROT terminal |
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Yellow “ALERT” | System Pressure Trip | 1. | High head pressure |
Flash Code 2 | Discharge or suction | 2. | Condenser coil poor air circulation (dirty, blocked, damaged) |
| pressure out of limits or | ||
| 3. | Condenser fan is not running | |
| compressor overloaded (if | ||
| no high pressure switch in | 4. | If low pressure switch present in system, check Flash Code 3 |
| system) LOCKOUT |
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Yellow “ALERT” | Short Cycling | 1. | If low pressure switch is open: |
Flash Code 3 | Compressor is running only |
| a. Low refrigerant charge |
| briefly LOCKOUT |
| b. Evaporator bower is not running |
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| c. Evaporator coil is frozen |
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| d. Faulty metering device |
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| e. Condenser coil is dirty |
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| f. Liquid line restriction |
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| 2. If high pressure switch present go to Flash Code 2 information | |
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| 3. | Intermittent thermostat demand signal |
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| 4. | System or control board defective |
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Yellow “ALERT” | Locked Rotor | 1. | Low line voltage to compressor |
Flash Code 4 | LOCKOUT | 2. | Excessive liquid refrigerant in compressor |
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| 3. | Compressor bearings are seized |
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Yellow “ALERT” | Open Circuit | 1. | Outdoor unit power disconnect is open |
Flash Code 5 |
| 2. | Compressor circuit breaker or fuse(s) is open |
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| 3. | Compressor contactor has failed open |
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| 4. | High pressure switch is open and requires manual reset |
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| 5. | Broken supply wires or connector is not making contact |
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| 6. | Unusually long compressor protector reset time due to ex‐ |
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| treme ambient temperature |
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| 7. | Compressor windings are damaged |
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Yellow “ALERT” | Missing Phase | 1. | Compressor fuse is open on one phase |
Flash Code 6 | LOCKOUT | 2. | Broken wire or connector on one phase |
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| 3. | Compressor motor winding is damaged |
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| 4. | Utility supply has dropped one phase |
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Yellow “ALERT” | Reverse Phase | 1. | Compressor running backward do to supply phase reversal |
Flash Code 7 | LOCKOUT |
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Yellow “ALERT” | Welded Contactor | 1. | Compressor contactor has failed closed |
Flash Code 8 | Compressor always runs | 2. | Thermostat demand signal not connected to module |
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Yellow “ALERT” | Low Voltage | 1. | Control circuit transformer is overloaded |
Flash Code 9 | Control circuit < 18VAC | 2. | Low line voltage to compressor |
S Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated. S TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
S Reset ALERT Flash code by removing 24VAC power from module.
S Last ALERT Flash code is displayed for 1 minute after module is powered on.
S ALERT codes can be reset manually or automatically. ALERT codes that result in a lockout or compressor lockout can only be reset manually.
-For manual reset, cycle power to Comfort Alert off and on.
-For automatic reset, Comfort Alert will continue to monitor compressor and system; if condition returns to normal, the ALERT code is automatically turned off.
506 01 5102 00 | 15 |