48/50PD
Table 8 — ComfortLink™ Alarm Codes (cont)
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ALARM |
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OR |
| DESCRIPTION | ACTION TAKEN BY | RESET | PROBABLE CAUSE | |
ALERT |
| CONTROL | METHOD | |||
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NUMBER |
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T178 |
| Loss of Communication with the Capacity | Unit shutdown | Automatic | Communication wiring problem with AUX1 or faulty | |
| Control Board | disable | MBB, ECB, or AUX1 | |||
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T179 |
| Loss of communication with the Economizer | No economizer | Automatic | Communication wiring problem with ECB or faulty | |
| Control Board | operation | MBB, ECB, or AUX1 | |||
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T180 |
| Loss of communication with the Economizer | No economizer | Automatic | Communication wiring problem with actuator. | |
| Actuator | operation | ||||
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A200 |
| Linkage Timeout Error | No Linkage Operation | Automatic | Received a table write from Linkage before, now not | |
| fall back to local SPT | receiving any linked commands | ||||
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A404 |
| Fire Shutdown | Unit Shutdown | Automatic | Smoke detected by smoke detector | |
T408 |
| Dirty Filter | Alert Generated | Automatic | Dirty Filter | |
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| If IDF.F = |
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| If IDF.F = Yes, then Unit | YES, then |
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| Fan Status Switch ON, Fan Contactor OFF | Manual, | Bad Fan Status Switch. Configuration incorrect. | |
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| Shutdown | |||
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| otherwise |
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T409 |
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| automatic |
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| If IDF.F = |
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| If IDF.F = Yes, then Unit | YES, then | Tripped Circuit Breaker. Broken belt. Bad indoor fan |
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| Fan Status Switch OFF, Fan Contactor ON | Manual, | ||
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| Shutdown | motor. Configuration incorrect. Bad fan status switch. | ||
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| otherwise | ||
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| automatic |
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| Economizer Damper Actuator Out of | Alert Generated | Automatic | Calibrate economizer (E.CAL). If problem still exist |
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| Calibration | then determine what is limiting economizer rotation. | ||
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| Economizer Damper Actuator Torque Above | Alert Generated | Automatic | Actuator load too high. Check damper load. |
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| Load Limit | |||
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| Economizer Damper Actuator Hunting | Alert Generated | Automatic | Damper position changing too quickly. |
T414 |
| Excessively | ||||
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| Economizer Damper Stuck or Jammed | Alert Generated | Automatic | No economizer motion. Check damper blades, gears, | ||
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| and actuator. | |||
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| Economizer Damper Actuator Mechanical | Alert Generated | Automatic | Check actuator and replace if necessary. |
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| Failure | |||
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| Economizer Damper Actuator Direction | Alert Generated | Automatic | Actuator direction control switch (CCW, CW) wrong. |
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| Switch Wrong | |||
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T415 |
| IAQ Input Out of Range | No IAQ Operations | Automatic | Bad sensor, bad wiring, or sensor configured | |
| incorrectly. | |||||
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T416 |
| OAQ Input Out of Range | No OAQ Operations | Automatic | Bad sensor, bad wiring, or sensor configured | |
| incorrectly. | |||||
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LEGEND |
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ECB | - | Economizer Control Board |
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IGC | - | Integrated Gas Controller |
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MBB - | Main Base Board |
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OAT | - |
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Cooling Troubleshooting
Use the Scrolling Marquee display or a CCN device to view the cooling status display and the cooling diagnostic display (see Appendix A) for information on the cooling operation. Check the current alarms and alarm history for any cooling alarm codes and correct any causes. (See Table 9.)
Verify any unique control configurations per installed site requirements or accessories. If alarms conditions are corrected and cleared, operation of the compressors and fans may be verified by using the Service Test mode. (See Table 5.) See Table 9 for general cooling service analysis.
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