Carrier XCT7 Installations- Und Benutzerhandbuch Seite 47

Failure Code
Digital tube Failure code definition
indication on
master unit
27-0 Oil temp. too high pro-
tection CToil1)
27-1 Oil temp. too high pro-
tection CToil2)
28 High pressure sensor Pd
29 Low pressure sensor Ps
30-0 High pressure switch
HPSi failure
30-1 High pressure switch
HPS2failure
33-0
EEPROM failure
33-2
33-3
34-0 Discharging temp. too
high protection CTd1)
34-1 Discharging temp. too
high protection CTd2)
35-0 4-way valve reversing
failure
35-1 4-way valve reversing
failure
36-0 Oil temp. too low protec-
tion CToil1)
36-1 Oil temp. too low protec-
tion ( Toil2)
39-0 Low pressure sensor Ps
too low protection
39-1 Compression ratio too
high
Protection
40 High pressure sensor Pd
too high protection
Failure description
Toil > 120 °C continuously for 2sec exceeds the set value after shut-
down of the alarm. The alarm condition after stopping the oil tem-
perature is below 10 degrees, automatic recovery is after 2min50s.
Four times an hour to confirm the fault
AD value is below 11(open circuit) or over 1012(short circuit) for 30
failure seconds
AD value is below 11(open circuit) or over 1012(short circuit) for 30
failure seconds
If disconnected for 2s continuously, there will be an alarm sound. lf
the alarm rings 3 times in an hour, it confirms the failure
AT24C04 EEPROM communication failure
AT24C04 EEPROM data check failure(model code, check sun etc.)
AT24C04 EEPROM data check failure(data beyond limit, reverse
sequence etc.)
Td > 120°C continuously for 2sec exceeds the set value after
shutdown Once alarm; the alarm condition after stopping the oil
temperature below confirmed 10 degrees, automatic recovery after
2min50s. Four times an hour un-resumable
to confirm the fault
After 4-way valve is electrified for 10 minutes and if the below condi-
tions can be met for continuous 10 seconds then that is conversing
successfully.
The outdoor compressor is running normally if
Td1orTd2-Tdef1 is 10°C & Toci-Taoss C & Pd-Ps is 0.3MPa, or
else, the system alarms indicate reversing failure.
If it occurs 3 times in an hour, it confirms the failure
After starting the main outdoor unit the four way valve is not
powered for 20 mins: 35-1 fault reported. Two times in one hour
confirms the fault.
During normal operation, if Toil< CT+10°C for continuous 5 min-
utes, the unit will stop and sound an alarm. After 2 minutes and 50
seconds it resumes automatically. If this occurs 3 times in an hour, it
confirms the failure
While the compressor is running (except for residual operation),
and in the cooling, Ps < 0.01MPa or in heating, Ps < 0.05MPa for
continuous 5 minutes, alarm will sound and stop the unit . 2 minutes
and 50 seconds later, it resumes automatically. If this occurs 3 times
in an hour, it confirms the failure
While the compressor is running, if the compression ratio £ > 10.0
for continuous 5 minutes, it will stop the unit and sound the alarm
. 2 minutes and 50 seconds later, it resumes automatically. If this
occurs 4 times in an hour, it confirms the failure.
If Pd 4.15MPa, alarm and stop, 2 minutes and 50 seconds Iater,
resume automatically o If t•I
the failure.
40
occurs 3 times in an hour, confirm
Remarks
Once confirmed,
un-resumable
Resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable
Once confirmed,
un-resumable