Table 16 Ð Alarm and Alert Codes
| ALARM |
| ACTION TAKEN | CIRCUIT | RESET |
| |
DISPLAY | OR | DESCRIPTION | BY CONTROL | PUMPDOWN | METHOD | PROBABLE CAUSE | |
| ALERT |
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0 | Ð | No Alarms or Alerts Exist | Ð | Ð | Ð | Ð | |
1 |
| Compressor A1 failure | Circuit A shut down | No | Manual | ||
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| error. | |
2, 3, 4 | Alert | Compressor A2, A3, A4 failure | Compressor shut down | Yes | Manual | CPCS Ground Fault Protection | |
5 |
| Compressor B1 failure | Circuit B shut down | No | Manual |
| |
6, 7, 8 |
| Compressor B2, B3, B4 failure | Compressor shut down | Yes | Manual |
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9 | Alarm | Leaving ¯uid thermistor failure | Unit shut down | Yes | Auto. |
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10 | Entering ¯uid thermistor failure | Unit shut down | Yes | Auto. |
| ||
| Thermistor or transducer failure | ||||||
19 |
| Compressor A1 sensor failure | Circuit A shut down | Yes | Auto. | ||
| |||||||
| or wiring error. | ||||||
20 | Alert | Compressor B1 sensor failure | Circuit B shut down | Yes | Auto. | ||
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21 |
| Reset thermistor failure | Normal set point used | No | Auto. |
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22 |
| Discharge pressure transducer failure, circuit A | Circuit A shut down | Yes | Auto. |
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23 |
| Discharge pressure transducer failure, circuit B | Circuit B shut down | Yes | Auto. |
| |
24 | Alert | Suction pressure transducer failure, circuit A | Circuit A shut down | No | Auto. | Transducer failure or wiring error. | |
25 | Suction pressure transducer failure, circuit B | Circuit B shut down | No | Auto. | |||
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26 |
| Oil pressure transducer failure, circuit A | Circuit A shut down | No | Auto. |
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27 |
| Oil pressure transducer failure, circuit B | Circuit B shut down | No | Auto. |
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28 | Alarm | Transducer supply voltage low | Unit shut down | No | Auto. | Unit voltage low or PS1 faulty. | |
29 | Unit shut down | No | Manual | Switch failure or wiring error. | |||
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30 | Alert | Normal set point used | No | Auto. |
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31 | Demand limit ignored | No | Auto. |
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32 |
| Loss of communication with | Unit shut down | No | Auto. | Wiring error or faulty module | |
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| Alarm |
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| or improper address code. | |
33 | Loss of communication with | Unit shut down | No | Auto. |
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34 |
| Loss of communication with 4 In/4 Out module | Unit shut down | Yes | Auto. |
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35 | Ð | Not used | Ð | Ð | Ð | Ð | |
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36 |
| Low refrigerant pressure circuit A | Circuit A shut down | No | * | Low refrigerant charge, plugged ®lter | |
| Alert |
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| drier, faulty expansion valve. | |
37 | Low refrigerant pressure circuit B | Circuit B shut down | No | * | Low refrigerant charge, plugged ®lter | ||
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| drier, faulty expansion valve. | |
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38 |
| Failure to pump out circuit A | Circuit A shut down | No | Manual | Faulty expansion valve, transducer, | |
| Alert |
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| or thermistor. | |
39 | Failure to pump out circuit B | Circuit B shut down | No | Manual | Faulty expansion valve, transducer, | ||
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| or thermistor. | |
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40 |
| Low oil pressure circuit A | Circuit A shut down | No | Manual | Low oil level, circuit breaker trip, | |
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| faulty expansion valve, crankcase | |
| Alert |
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| heater, or pressure transducer. | |
41 | Low oil pressure circuit B | Circuit B shut down | No | Manual | Low oil level, circuit breaker trip, | ||
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| faulty expansion valve, crankcase | |
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| heater, or pressure transducer. | |
42 |
| Cooler freeze protection | Unit shut down | No | * | Low ¯uid ¯ow or faulty thermistor. | |
43 | Alarm | Low cooler ¯uid ¯ow | Unit shut down | No | Manual | Chilled ¯uid pump failure | |
44 |
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| or faulty thermistor. | |
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| |||
| Low suction temperature circuit A | Circuit A shut down | No | Manual | Faulty expansion valve or thermistor. | ||
| Alert |
| after 10 minutes |
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45 | Low suction temperature circuit B | Circuit B shut down | No | Manual | Faulty expansion valve or thermistor. | ||
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| after 10 minutes |
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46 |
| High suction superheat circuit A | Circuit A shut down | Yes | Manual | Low charge, faulty expansion valve or | |
| Alert |
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| thermistor, or plugged ®lter drier. | |
47 | High suction superheat circuit B | Circuit B shut down | Yes | Manual | Low charge, faulty expansion valve or | ||
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| thermistor, or plugged ®lter drier. | |
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48 | Alert | Low suction superheat circuit A | Circuit A shut down | Yes | Manual | Faulty EXV or thermistor. | |
49 | Low suction superheat circuit B | Circuit B shut down | Yes | Manual | Faulty EXV or thermistor. | ||
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50 |
| Illegal con®guration | Unit cannot start | Ð | Manual | Con®guration error. | |
51 | Alarm | Initial con®guration required | Unit cannot start | Ð | Manual | Con®guration omitted. | |
52 |
| Emergency stop by CCN command | Unit shut down | Yes | CCN | Network command. | |
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53 |
| Cooler pump interlock failure | Unit shut down | No | Manual | Failure of cooler pump or controls | |
54 | Alarm | Cooler pump interlock failure | Unit shut down | No | Manual | Failure of cooler pump or controls | |
55 |
| Cooler pump interlock failure | Cooler pump shut down | Ð | Manual | Failure of cooler pump relay or interlock | |
56 | Alert | WSM communication failure | WSM forces removed | Ð | Auto. | Wiring fault or module failure | |
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57 |
| Calibration required for discharge pressure | Circuit cannot start | Ð | Auto. |
| |
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| transducer, circuit A |
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58 |
| Calibration required for discharge pressure | Circuit cannot start | Ð | Auto. |
| |
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| transducer, circuit B |
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59 |
| Calibration required for suction pressure | Circuit cannot start | Ð | Auto. |
| |
| Alert | transducer, circuit A |
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| Transducer not calibrated | |
60 | Calibration required for suction pressure | Circuit cannot start | Ð | Auto. | |||
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| transducer, circuit B |
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61 |
| Calibration required for oil pressure | Circuit cannot start | Ð | Auto. |
| |
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| transducer, circuit A |
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62 |
| Calibration required for oil pressure | Circuit cannot start | Ð | Auto. |
| |
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| transducer, circuit B |
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49