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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| |
A140 | Alert | Reverse Rotation | Incoming chiller power | Chiller not allowed to | Manual | Reverse any two | |
|
| Detected | leads not phased correctly | start. |
| incoming power | |
|
|
|
|
|
| leads to correct. | |
|
|
|
|
|
| Check for correct fan | |
|
|
|
|
|
| rotation first. | |
|
|
|
|
|
|
| |
A150 | Alarm | Emergency Stop | SCN emergency stop | Chiller shutdown | Automatic once SCN | SCN Network | |
|
|
| command received | without going through | command for | command. | |
|
|
|
| pumpdown. | EMSTOP returns to |
| |
|
|
|
|
| normal |
| |
|
|
|
|
|
|
| |
A151 | Alarm | Illegal Configuration | One or more illegal | Chiller is not allowed to | Manual once | Configuration error. | |
|
|
| configurations exists. | start. | configuration errors | Check unit settings. | |
|
|
|
|
| are corrected |
| |
|
|
|
|
|
|
| |
A152 | Alarm | Unit Down Due to | Both circuits are down due | Chiller is unable | Automatic once | Alarm notifies user | |
|
| Failure | to alarms/alerts. | to run. | alarms/alerts are | that chiller is 100% | |
|
|
|
|
| cleared that prevent | down. | |
|
|
|
|
| the chiller from |
| |
|
|
|
|
| starting. |
| |
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|
|
|
|
|
| |
T153 | Alert | Real Time Clock | Internal clock on MBB fails | Occupancy schedule | Automatic when | Time/Date/Month/ | |
|
| Hardware Failure |
| will not be used. Chiller | correct clock control | Day/Year not | |
|
|
|
| defaults to Local On | restarts. | properly set. | |
|
|
|
| mode. |
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| |
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|
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|
|
| |
A154 | Alarm | Serial EEPROM | Hardware failure with MBB | Chiller is unable | Manual | Main Base Board | |
|
| Hardware Failure |
| to run. |
| failure. | |
|
|
|
|
|
|
| |
T155 | Alert | Serial EEPROM | Configuration/storage | No Action | Manual | Potential failure of | |
|
| Storage Failure | failure with MBB |
|
| MBB. Download | |
|
|
|
|
|
| current operating | |
|
|
|
|
|
| software. Replace | |
|
|
|
|
|
| MBB if error occurs | |
|
|
|
|
|
| again. | |
A156 | Alarm | Critical Serial EEPROM | Configuration/storage | Chiller is not allowed | Manual | Main Base Board | |
|
| Storage Failure | failure with MBB | to run. |
| failure. | |
A157 | Alarm | A/D Hardware Failure | Hardware failure with | Chiller is not allowed | Manual | Main Base Board | |
|
|
| peripheral device | to run. |
| failure. | |
A189 | Alarm | Cooler pump auxiliary | Pump 1 (2) aux contacts | Both pump outputs | Manual | Wiring error, faulty | |
|
| contact inputs miswired | closed when pump 2 (1) | are turned off. |
| pump contactor | |
|
|
| energized. |
|
| auxiliary contacts. | |
T173 | Alert | Loss of Communication | MBB loses communication | 4 to 20 mA | Automatic | Wiring error, faulty | |
|
| with EMM | with EMM | temperature reset |
| wiring or failed | |
|
|
|
| disabled. Demand |
| Energy Manage- | |
|
|
|
| Limit set to 100%. 4 to |
| ment Module (EMM). | |
|
|
|
| 20 mA set point |
|
| |
|
|
|
| disabled. |
|
| |
|
|
|
|
|
|
| |
T174 | Alert | 4 to 20 mA Cooling Set | If configured with EMM and | Set point function | Automatic | Faulty signal | |
|
| Point Input Failure | input less than 2 mA or | disabled. Chiller |
| generator, wiring | |
|
|
| greater than 22 mA | controls to CSP1. |
| error, or faulty EMM. | |
T176 | Alert | 4 to 20 mA | If configured with EMM | Reset function | Automatic | Faulty signal | |
|
| Temperature Reset | and input less than 2 mA or | disabled. Chiller |
| generator, wiring | |
|
| Input Failure | greater than 22 mA | returns to normal set |
| error, or faulty EMM. | |
|
|
|
| point control. |
|
| |
|
|
|
|
|
|
| |
T177 | Alert | 4 to 20 mA Demand | If configured with EMM and | Demand limit function | Automatic | Faulty signal | |
|
| Limit Input Failure | input less than 2 mA or | disabled. Chiller |
| generator, wiring | |
|
|
| greater than 22 mA | returns to 100% |
| error, or faulty EMM. | |
|
|
|
| demand limit |
|
| |
|
|
|
| control. |
|
| |
|
|
|
|
|
|
| |
T189 | Alarm | Cooler pump 2 and | Alarm is generated when | Chiller not allowed to | Manual | Wiring error | |
|
| Aux Contact Input | the pump’s aux contacts | start |
|
| |
|
| miswired | close when a pump is |
|
|
| |
|
|
| called for |
|
|
| |
T190 | Alert | Cooler pump 1 Aux | Pump 1 Auxiliary Contacts | Pump 1 turned off. | Manual | Wiring error, faulty | |
|
| Contacts Failed to Close | did not close within | Pump 2 will be started |
| contacts on pump | |
|
| at | 26 seconds after pump | if available. |
| contactor | |
|
|
| was started |
|
|
| |
T191 | Alert | Cooler pump 2 Aux | Pump 2 Auxiliary Contacts | Pump 2 turned off. | Manual | Wiring error, faulty | |
|
| Contacts Failed to Close | did not close within | Pump 1 will be started |
| contacts on pump | |
|
| at | 26 seconds after pump | if available. |
| contactor | |
|
|
| was started |
|
|
| |
|
|
|
|
|
|
| |
T192 | Alert | Cooler pump 1 Failed | Pump 1 did not provide | Pump 1 turned off. | Manual | Wiring error, pump | |
|
| to Provide Flow at | flow to close flow switch | Pump 2 will be started |
| circuit breaker | |
|
| within 60 seconds | if available. |
| tripped, contactor | ||
|
|
|
|
|
| failure | |
T193 | Alert | Cooler pump 2 Failed | Pump 2 did not provide | Pump 1 turned off. | Manual | Wiring error, pump | |
|
| to Provide Flow at | flow to close flow switch | Pump 2 will be started |
| circuit breaker | |
|
| within 60 seconds | if available. |
| tripped, contactor | ||
|
|
|
|
|
| failure | |
T194 | Alert | Cooler pump 1 Aux | Pump 1 Auxiliary Contacts | Pump 2 will be started | Manual | Wiring error, faulty | |
|
| Contacts Opened | open for 26 seconds after | if available. Chiller |
| contacts on pump | |
|
| During Normal | initially made. All | allowed to run if |
| contactor | |
|
| Operation | compressors shut down. | Pump 2 successfully |
|
| |
|
|
| Pump 1 turned off. | starts. |
|
| |
T195 | Alert | Cooler pump 2 Aux | Pump 2 Auxiliary Contacts | Pump 1 will be started | Manual | Wiring error, faulty | |
|
| Contacts Opened | open for 26 seconds after | if available. Chiller |
| contacts on pump | |
|
| During Normal | initially made. All | allowed to run if |
| contactor | |
|
| Operation | compressors shut down. | Pump 1 successfully |
|
| |
|
|
| Pump 2 turned off. | starts. |
|
|
55
