Carrier 39HXC, Руководство пользователя, Страница: 46 / 64

7 - FAULTS
When the PLC detects an issue, it triggers a fault.
7.1 - Type of faults
Faults may either be "maintenance" or "danger" type faults.
"Maintenance" faults are information provided to the user and signal that the unit is not operating correctly, but that this does not have
any immediate consequences (a fouled filter, for example). These may be cleared once the issue has been resolved.
"Danger" faults are issues which prevent the unit from operating; the unit will shut down immediately (or after the fan delay).
The issue must be resolved before the unit can be restarted. The faults may be cleared once the AHU has been shut down and the
fault has disappeared.
"Maintenance" faults may be configured as "danger" faults using parameters P600 to P653. Conversely, for safety reasons, it is not
possible to configure "danger" faults as "maintenance" faults.
7.2 - Fault relays
The PLC contains a "maintenance" faults summary relay and a "danger" faults summary relay. These are 250V AC / 1A type relays.
They are tripped when at least one "maintenance" or "danger" fault, respectively, is present.
Their direction of action is configurable (P880 and P881).
7.3 - Fault memory
The PLC stores the last 100 faults and the date and time that each of these faults occurred. This is the "fault memory" menu.
This memory cannot be cleared.
7.4 - List of faults
No. Designation of faults Fault level
1 Powered down -
2 Fire protection Danger
4
Frost protection
Danger
11
Intake EC motor
Danger
31 Exhaust EC motor Danger
48 Intake air flow low limit Danger
49
Extraction air flow low limit
Danger
52
Air intake filter 1 fouled
Maintenance
53
Intake filter 1 blocked
Danger
58
Exhaust filter 1 fouled
Maintenance
59
Extraction filter 1 blocked
Danger
62
Intake filter pressure sensor fault
Danger
63
Exhaust filter pressure sensor fault
Danger
65 Rotary heat exchanger Maintenance
66 Heat recovery frosted Danger
71 Electric heater safety thermostat Maintenance
80 Intake duct pressure too low Maintenance
81 Intake duct pressure too high Maintenance
No. Designation of faults Fault level
82 Supply air temperature too low Maintenance
83 Supply air temperature too high Maintenance
84 Return temperature too low Maintenance
85 Return temperature too high Maintenance
86 Room temperature too low Maintenance
87 Room temperature too high Maintenance
90 Fresh air temperature sensor Danger
91 Supply air temperature sensor Danger
92 Return air temperature sensor Danger
93 Room air temperature sensor Maintenance
94 Intake flow rate pressure sensor Danger
95 Exhaust flow rate pressure sensor Danger
141 Loss of communication with the heat recovery
unit outlet temperature sensor, intake side
Maintenance
150 Loss of communication with Th-Tune Maintenance
151 Coil 1 pump fault Maintenance
152 Coil 2 pump fault Maintenance
153 Heat recovery unit pressure sensor fault Danger
154 Additional casing supply air sensor fault Danger
155 Exhaust duct pressure too low Maintenance
156 Exhaust duct pressure too high Maintenance
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