Table 29 — 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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|
|
|
|
|
| |
T093 | Alert | Circuit B Suction | Voltage ratio more than | Circuit B shut down | Automatic | Transducer failure, poor | |
|
| Pressure Transducer | 99.9% or less than .5%. |
|
| connection to MBB, or wiring | |
|
| Failure |
|
|
| damage/error. | |
T110 | Alert | Circuit A Loss of Charge | If the compressors are off | Circuit not allowed to | Manual | Refrigerant leak or | |
|
|
| and discharge pressure | start. |
| transducer failure | |
|
|
| reading is < 10 psig for |
|
|
| |
|
|
| 30 sec. |
|
|
| |
|
|
|
|
|
|
| |
T111 | Alert | Circuit B Loss of Charge | If the compressors are off | Circuit not allowed to | Manual | Refrigerant leak or | |
|
|
| and discharge pressure | start. |
| transducer failure | |
|
|
| reading is < 10 psig for |
|
|
| |
|
|
| 30 sec. |
|
|
| |
|
|
|
|
|
|
| |
T112 | Alert | Circuit A High Saturated | Circuit saturated suction | Circuit shut down | Manual | Faulty Expansion valve, | |
|
| Suction Temperature | temperature pressure |
|
| faulty suction pressure | |
|
|
| transducer > 60 F (15.6 C) |
|
| transducer or high entering | |
|
|
| for 5 minutes |
|
| fluid temperature. | |
T113 | Alert | Circuit B High Saturated | Circuit saturated suction | Circuit shut down | Manual | Faulty Expansion valve, | |
|
| Suction Temperature | temperature pressure |
|
| faulty suction pressure | |
|
|
| transducer > 60 F (15.6 C) |
|
| transducer or high entering | |
|
|
| for 5 minutes |
|
| fluid temperature. | |
T114 | Alert | Circuit A Low Suction | Return gas sensor enabled | Circuit A shut down after | Automatic restart | Faulty expansion valve, | |
|
| Superheat | and suction superheat is | pumpdown complete. | after first daily | faulty suction pressure | |
|
|
| more than 10° F (5.6 C) |
| occurrence. | transducer, faulty suction gas | |
|
|
| below the suction superheat |
| Manual restart | thermistor, circuit | |
|
|
| set point for 5 minutes. |
| thereafter. | overcharged | |
T115 | Alert | Circuit B Low Suction | Return gas sensor enabled | Circuit B shut down after | Automatic restart | Faulty expansion valve, | |
|
| Superheat | and suction superheat is | pumpdown complete. | after first daily | faulty suction pressure | |
|
|
| more than 10° F (5.6 C) |
| occurrence. | transducer, faulty suction | |
|
|
| below the suction superheat |
| Manual restart | gas thermistor, circuit | |
|
|
| set point for 5 minutes. |
| thereafter. | overcharged | |
T116 | Alert | Circuit A Low Cooler | Mode 7 caused the com- | Circuit shut down | Manual | Faulty expansion valve, low | |
|
| Suction Temperature | pressor to unload 6 consecu- |
|
| refrigerant charge, plugged | |
|
|
| tive times with less than a |
|
| filter drier, faulty suction | |
|
|
|
|
| pressure transducer, low | ||
|
|
| each circuit shutdown. |
|
| cooler fluid flow | |
T117 | Alert | Circuit B Low Cooler | Mode 8 caused the com- | Circuit shut down | Manual | Faulty expansion valve, low | |
|
| Suction Temperature | pressor to unload 6 consecu- |
|
| refrigerant charge, plugged | |
|
|
| tive times with less than a |
|
| filter drier, faulty suction | |
|
|
|
|
| pressure transducer, low | ||
|
|
| each circuit shutdown. |
|
| cooler fluid flow | |
T126 | Alert | Circuit A High | SCT >Maximum condensing | Circuit shut down | Automatic, only | Faulty transducer/high | |
|
| Discharge Pressure | temperature from operating |
| after first 3 daily | pressure switch, low/ | |
|
|
| envelope |
| occurrences. | restricted condenser | |
|
|
|
|
| Manual reset | airflow | |
|
|
|
|
| thereafter. Read- |
| |
|
|
|
|
| ing from OAT sen- |
| |
|
|
|
|
| sor (T9) must drop |
| |
|
|
|
|
| 5 F (2.8 C) before |
| |
|
|
|
|
| restart |
| |
T127 | Alert | Circuit B High | SCT >Maximum condensing | Circuit shut down | Automatic, only | Faulty transducer/high | |
|
| Discharge Pressure | temperature from operating |
| after first 3 daily | pressure switch, low/ | |
|
|
| envelope |
| occurrences. Man- | restricted condenser | |
|
|
|
|
| ual reset thereafter. | airflow | |
|
|
|
|
| Reading from OAT |
| |
|
|
|
|
| sensor (T9) must |
| |
|
|
|
|
| drop 5 F (2.8 C) |
| |
|
|
|
|
| before restart |
| |
T133 | Alert | Circuit A Low Suction | Suction pressure below | Circuit shut down | Automatic | Faulty or plugged TXV, low | |
|
| Pressure | 15 psig for 8 seconds or |
| restart after first | refrigerant charge, TXV out | |
|
|
| below 8 psig |
| daily occurrence. | of adjustment, liquid | |
|
|
|
|
| Manual restart | line valve partially closed | |
|
|
|
|
| thereafter. |
| |
T134 | Alert | Circuit B Low Suction | Suction pressure below | Circuit shut down | Automatic | Faulty or plugged TXV, low | |
|
| Pressure | 15 psig for 8 seconds or |
| restart after first | refrigerant charge, TXV out | |
|
|
| below 8 psig |
| daily occurrence. | of adjustment, liquid | |
|
|
|
|
| Manual restart | line valve partially closed | |
|
|
|
|
| thereafter. |
|
54
