Table 42 — Alarm and Alert Codes (cont)
ALARM/ | ALARM |
| WHY WAS THIS | ACTION TAKEN | RESET | PROBABLE | |
ALERT | OR | DESCRIPTION | ALARM | ||||
BY CONTROL | METHOD | CAUSE | |||||
CODE | ALERT |
| GENERATED? | ||||
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| If the compressors are off |
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T110 | Alert | Circuit A Loss of Charge | and discharge pressure | Circuit not allowed to | Manual | Refrigerant leak or | |
reading is < 26 psig for | start. | transducer failure | |||||
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| 30 sec. |
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| If the compressors are off |
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T111 | Alert | Circuit B Loss of Charge | and discharge pressure | Circuit not allowed to | Manual | Refrigerant leak or | |
reading is < 26 psig for | start. | transducer failure | |||||
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| 30 sec. |
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| Circuit saturated suction |
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| Faulty Expansion valve, | |
T112 | Alert | Circuit A High Saturated | temperature pressure | Circuit shut down | Manual | faulty suction pressure | |
Suction Temperature | transducer > 70 F (21.1 C) | transducer or high entering | |||||
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| for 5 minutes |
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| fluid temperature. | |
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| Circuit B High Saturated | Circuit saturated suction |
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| Faulty Expansion valve, | |
T113 |
| temperature pressure |
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| faulty suction pressure | ||
Alert | Suction Temperature | Circuit shut down | Manual | ||||
transducer > 70 F (21.1 C) | transducer or high entering | ||||||
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| for 5 minutes |
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| fluid temperature. | |
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| Automatic restart | Faulty expansion valve, | |
T114 |
| Circuit A Low Suction | Suction superheat is |
| after first daily | faulty suction pressure | |
Alert | less than 5° F (2.8 C) for 5 | Circuit A shut down. | occurrence. | transducer, faulty suction gas | |||
Superheat | |||||||
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| minutes. |
| Manual restart | thermistor, circuit | ||
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| thereafter. | overcharged | |
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| Automatic restart | Faulty expansion valve, | |
T115 |
| Circuit B Low Suction | Suction superheat is |
| after first daily | faulty suction pressure | |
Alert | less than 5° F (2.8 C) for 5 | Circuit B shut down. | occurrence. | transducer, faulty suction | |||
Superheat | |||||||
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| minutes. |
| Manual restart | gas thermistor, circuit | ||
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| thereafter. | overcharged | |
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| Mode 7 caused the com- |
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| Faulty expansion valve, low | |
T116 |
| Circuit A Low Cooler | pressor to unload 6 consecu- |
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| refrigerant charge, plugged | |
Alert | tive times with less than a | Circuit shut down | Manual | filter drier, faulty suction | |||
Suction Temperature | |||||||
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| pressure transducer, low | |||
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| each circuit shutdown. |
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| cooler fluid flow | |
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| Mode 8 caused the com- |
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| Faulty expansion valve, low | |
T117 |
| Circuit B Low Cooler | pressor to unload 6 consecu- |
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| refrigerant charge, plugged | |
Alert | tive times with less than a | Circuit shut down | Manual | filter drier, faulty suction | |||
Suction Temperature | |||||||
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| pressure transducer, low | |||
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| each circuit shutdown. |
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| cooler fluid flow | |
T118 |
| High Discharge Gas | Discharge Thermistor (DTT) | Compressor A1 shut |
| Refrigerant charge, plugged | |
Alert | Automatic | filter drier, head pressure | |||||
Temperature Alert | reading is greater than 250 F | down | |||||
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| control. | ||||
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A118 |
| High Discharge Gas | 3 Discharge Gas Tempera- | Compressor A1 shut |
| Refrigerant charge, plugged | |
Alarm | ture alarms occur within a | Manual | filter drier, head pressure | ||||
Temperature | down | ||||||
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| day |
| control. | |||
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| Automatic, only |
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| after first 3 daily |
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| occurrences. | Faulty transducer/high | |
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| Manual reset | ||
T126 |
| Circuit A High | Compressor operation out- |
| pressure switch, low/ | ||
Alert | Circuit shut down | thereafter. Read- | |||||
Discharge Pressure | side of operating envelope. | restricted condenser | |||||
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| ing from OAT sen- | ||||
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| airflow | ||
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| sor must drop 5 F | ||
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| (2.8 C) before |
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| restart |
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| Automatic, only |
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| after first 3 daily | Faulty transducer/high | |
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| occurrences. Man- | ||
T127 | Alert | Circuit B High | Compressor operation out- | Circuit shut down | ual reset thereafter. | pressure switch, low/ | |
Discharge Pressure | side of operating envelope. | Reading from OAT | restricted condenser | ||||
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| sensor must drop | airflow | |
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| 5 F (2.8 C) before |
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| restart |
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| Automatic |
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T133 |
| Circuit A Low Suction | Suction pressure below |
| restart after first | Faulty or sticking EXV, low | |
Alert | 34 psig for 8 seconds or | Circuit shut down | daily occurrence. | refrigerant charge, plugged | |||
Pressure | |||||||
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| below 23 psig |
| Manual restart | filter drier. | ||
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| thereafter. |
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| Automatic |
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T134 |
| Circuit B Low Suction | Suction pressure below |
| restart after first | Faulty or sticking EXV, low | |
Alert | 34 psig for 8 seconds or | Circuit shut down | daily occurrence. | refrigerant charge, plugged | |||
Pressure | |||||||
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| below 23 psig |
| Manual restart | filter drier. | ||
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| thereafter. |
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A140 |
| Reverse Rotation | Incoming chiller power leads | Chiller not allowed to |
| Reverse any two incoming | |
Alert | Manual | power leads to correct. Check | |||||
Detected | not phased correctly | start. | |||||
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| for correct fan rotation first. | ||||
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| Chiller shutdown | Automatic once |
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A150 |
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| CCN emergency stop | CCN command for | CCN Network | ||
Alarm | Emergency Stop | without going through | |||||
command received | EMSTOP returns to | command. | |||||
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| pumpdown. | ||||
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| normal |
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A151 |
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| One or more illegal | Chiller is not allowed to | Manual once | Configuration error. | |
Alarm | Illegal Configuration | configuration errors | |||||
configurations exists. | start. | Check unit settings. | |||||
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| are corrected | ||||
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| Automatic once |
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A152 |
| Unit Down Due to | Both circuits are down due | Chiller is unable | alarms/alerts are | Alarm notifies user | |
Alarm | cleared that pre- | that chiller is 100% | |||||
Failure | to alarms/alerts. | to run. | |||||
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| vent the chiller from | down. | ||||
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| starting. |
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