Failure Codes - Carrier XCT7 Installations- Und Benutzerhandbuch

Failure codes

Inverter outdoor unit failure code
Digital tube
indication
Failure code
on master
definition
t
uni
20-0 Defrosting temp.
sensor Te failure
20-1 Defrosting temp.
sensor Tc failure
Ambient temp.
sensor Ta failure
21
Suction temp.
sensor Ts failure
22
Discharging temp.
23
sensor Td failure
26
Indoor
communication
26-1
failure
26-2
High pressure
switch HPS failure
30
33 EEPROM failure
Discharging temp.
too high protection
34
(Td)
4-way valve
35
reversing failure
Discharging temp.
sensor Td too low
43
protection
Communication
with inverter board
46
failure
Low pressure
49
switch LPS failure
Failure description
AD value is below 11 (open circuit) or over 1012
(short circuit) for 60 seconds, in cooling mode, if
the sensor is abnormal, the unit does not deal with
it, besides, during defrosting and within 3 minutes
after defrosting, there is no alarm
AD value is below 11 (open circuit) or over 1012 (short
circuit) for 60 seconds, during defrosting and within 3
minutes after defrosting, there is no alarm
AD value is below 11 (open circuit) or over 1012 (short
circuit) for 60 seconds, during defrosting and within 3
minutes after defrosting, there is no alarm
After compressor runs for 5 minutes, AD value is
below 11 (open circuit) or over 1012 (short circuit)
for
60 seconds, in the course of start-up, defrosting and
within 3 minutes after defrosting, there is no alarm
For 200 consecutive cycles, no communication with any
indoor units
For 300 continuous seconds, the searched indoor
quantity is less than the set quantity.
For 300 continuous seconds, the searched indoor
quantity is more than the set quantity.
If disconnected for 50 ms continuously, an alarm sounds.
If alarm sounds thrice in an hour, confirm the failure
EEPROM failure
Td≥239°F(115°C) at 25 msec intervals twice
continuously, and over the set value, then stops, and an
alarm sounds; 3 minutes later, resumes automatically. If it
occurs thrice in an hour, confirm the failure.
After 4-way valve is charged for 3 minutes, if the below
conditions can be met for 10 continuous seconds, it is
communicating successfully:
1.
this outdoor compressor is running normally
2.
Pd-Ps≥87PSI(0.6MPa); otherwise, the system
alarms indicate reversing failure.
In normal operation, if Td<CT+50°F
(10°C) for 5 continuous minutes, the unit stops and
sounds the alarms. 2 minutes and 50 seconds later,
resumes automatically. If
it occurs thrice in an hour, confirm the failure. After fixed
frequency compressor alarms, inverter compressor will
continue to run. If fixed frequency compressor has been
locked thrice, the unit will stop and sound the alarm.
No communication for 30 seconds
If disconnected for 50 ms continuously, alarm will sound.
If alarm sounds thrice in an hour, confirm the failure
21
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Once confirmed,
non-resumable
Once
confirmation,
un-resumable
Once confirmed,
non-resumable
Once confirmed,
non-resumable
Once confirmed,
non-resumable
Resumable
Once
confirmed, non-
resumable"