ALARM CODE DESCRIPTIONS (continued)
ALARM | ALARM NAME | ALARM DESCRIPTION | ACTION TAKEN BY | RESET TYPE | PROBABLE CAUSE |
CODE |
|
| THE CONTROL |
|
|
30 | Low refrigerant pressure failure, | Circuit running and the suction pressure | Circuit shut down | Automatic when pressure returns to | Shortage of refrigerant, filter blocked or |
| circuit A | below threshold |
| normal and if the same fault has not | faulty pressure sensor |
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| occurred the same day (machine |
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| equipped with CCN/clock board, If not, |
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| manual) |
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31 | Low refrigerant pressure failure, | As above | As above | As above | As above |
| circuit B |
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|
32 | High pressure failure, circuit A | Circuit running and the discharge pressure | Circuit shut down | Manual, the high pressure switch must | Fan circuit fault, high condenser |
|
| exceeds the high pressure trip point |
| be reset manually with the | entering air temperature |
|
|
|
| located on or in the pressure switch |
|
33 | High pressure failure, circuit B | As above | As above | As above | As above |
34 | Reverse compressor rotation, | One circuit compressor runs in reverse | As above | As above | Incorrect compressor wiring |
| circuit A | rotation |
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|
|
35 | Reverse compressor rotation, | As above | As above | As above | As above |
| circuit B |
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|
36 | Water heat exchanger frost | The heat exchanger entering or leaving | Unit shut down | Automatic if the same alarm has not | Low water flow or defective thermistor |
| protection | water sensor is below the frost trip point |
| tripped the same day (machine equipped |
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| with CCN/clock board, If not, manual) |
|
37 | Repeated low evaporator | More than 6 successive circuit capacity | Circuit shut down | Manual | Faulty pressure sensor, clogged filter or |
| suction temperature unloading, | unloads because of low suction temperature |
|
| low refrigerant charge |
| circuit A | override. |
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|
|
38 | Repeated low evaporator suction | As above | As above | As above | As above |
| temperature unloading, circuit B |
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|
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|
39 | Repeated high pressure | More than 6 successive circuit capacity | None | Automatic | Faulty transducer, high condenser |
| unloading, circuit A | unloads because of high pressure override. |
|
| entering air temperature, high entering |
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|
| water temperature, condenser fouled |
|
|
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|
| fan flow rate too low. |
40 | Repeated high pressure | As above | As above | As above | As above |
| unloading, circuit B |
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|
41 | Repeated high discharge | More than 8 successive circuit capacity | As above | As above | Pressure sensor faulty or heat |
| temperature unloading in | unloads because of high discharge |
|
| exchanger fouled |
| heating mode, circuit A | temperature |
|
|
|
42 | Repeated high discharge | As above | As above | As above | As above |
| temperature unloading in |
|
|
|
|
| heating mode, circuit B |
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|
|
43 | Repeated low suction | More than 8 successive circuit capacity | As above | As above | Pressure sensor faulty, filter obstructed, |
| temperature unloading in | unloads because of low suction temperature |
|
| shortage of refrigerant, heat exchanger |
| heating mode, circuit A |
|
|
| fouled or fan faulty. |
44 | Repeated low suction | As above | As above | As above | As above |
| temperature unloading in |
|
|
|
|
| heating mode, circuit B |
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|
45 | Low heat exchanger entering | Heat exchanger temperature is too low (less | Unit shut down | As above | As above |
| water temperature in heating | than 10°C), preventing unit |
|
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|
| mode |
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|
|
46 | Safety interlock open | Safety interlock not closed before end of the | Unit prevented to start | Manual | Evaporator pump control or water flow |
|
| or shut down |
| switch failure | |
47 | Pump #1 fault | Evap. water pump run contact opens while | Unit shut down | Manual | Pump overheat, incorrect pump |
|
| the pump has received a command to be on |
|
| connection |
48 | Pump #2 fault | As above | Unit shut down | Manual | As above |
49 | CCN emergency stop | CCN command received to shutdown the | Unit shut down | Manual | Network command |
|
| unit |
|
|
|
50 | Loss of communication with | The unit is controlled by a System Manager | Unit returns to | Automatic when communication is re- | Defective CCN bus wiring or system |
| System Manager | and communication with this module is lost | autonomous operating | established | module failure |
|
| for more than 2 minutes | mode |
|
|
51 | Communication failure with the | The master/slave link is broken due to a | As above | As above | As above |
| master or the slave unit | loss of communication between the two |
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| units for more than 2 minutes |
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52 | Initial factory configuration | All factory parameters are zero | Unit prevented to start | Automatic | No factory configuration |
| required |
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53 | Illegal factory configuration | Wrong factory configuration | As above | Automatic | Factory configuration error |
54 | Master/slave configuration error | Wrong master/slave configuration | Master/slave control | Automatic | Master or slave configuration error |
|
|
| disabled |
|
|
| Maintenance alerts | A maintenance alert is active | None | Manual |
|
Water loop flow rate too low |
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| |
Maintenance delay, pump 1, |
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| |
| elapsed |
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Maintenance delay, pump 2, |
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| elapsed |
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Maintenance delay, water filter, |
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| |
| elapsed |
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Order No.
Manufactured by: Carrier s.a., Montluel, France. Printed in the Netherlands on