Failure Codes - Carrier XCT7 Installations- Und Benutzerhandbuch

Failure codes

Failure code
The outdoor unit failure code table
BM1 Indoor searching
1
after start-up
Failure code
display on the
outdoor digital
display
board
20-0 Defrosting temp.
sensor (Te) failure
Ambient temp. sen-
sor (Ta) failure
21
22 Suction temp. sensor
(Ts) failure
23 Discharge temp.
sensor (Td) failure
26-0
Communication
26-1
failure with indoor
units
26-2
28 Discharge pressure
sensor (Pd) failure
29 Suction pressure
sensor (Ps) failure
High pressure switch
(HPS) failure
30
33 EEPROM failure
Discharge temp. too
high (Td)
34
4-way valve
reversing failure
35
Failure code defi-
nition
Continuously disconnected for 60 seconds or
short circuit; failure alarm sounds.
Continuously disconnected for 60 seconds or
short circuit; failure alarm sounds.
Continuously disconnected for 60 seconds or
short circuit; failure alarm sounds.
Continuous disconnect for 60 seconds or short
circuit; failure alarm sounds.
No indoor unit's connection can be detected for
200 continuous cycles.
It was detected that the number of indoor units
were less than the set number for 300 sec-
onds.
It was detected that the number of indoor units
were more than the set number for 300 sec-
onds.
Continuously disconnected for 60 seconds or
short circuit; failure alarm sounds.
Continuously disconnected for 60 seconds or
short circuit; failure alarm sounds.
When the high pressure switch is open; failure
alarm sounds. When the high pressure switch
is closed, failure is removed. Failure is locked if
it occurs thrice in one hour.
Outdoor unit EEPROM failure
Td [115]°C, failure alarm sounds; Td=[85]°C,
failure removed. Failure is locked if it occurs
thrice in one hour.
After the compressor starts, it runs contin-
uously for 10 minutes if the four- way valve
does not reverse failure alarm. The failure
will be removed after 3 minutes. Failure is
locked if it occurs thrice in one hour.
0 Begin to search indoor
1 Stop searching indoor and lock the quantity
Failure code definition
25
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Once failure is
locked, non-
resumable.
Un- resumable
Once failure is
locked, non-
resumable
Once failure locked,
un- resumable