Trane 4TXK6512G1000AA, Service Manual

Page: 164 / 187

9.4 Oudoor unit function
9.4.1 Compressor discharge temp. (TD) high temp. protection function.
If it lasts 3 seconds, the unit will stop. After standing
by 3 minutes, the unit can restart. If it happens 3
times in 60 minutes. The unit will stop and alarm. it
will disappear if the unit back to power.
9.4.2 Condenser overheat protection
When cooling, compare TC with TE. Choose the bigger one, TC’. TC’=MAX.[TC, TE]. You can control the
high pressure through controlling TC’.
happens 3 times in 30
Fast frequency reduction 2
alarm. It will disappear
Fast frequency reduction 2
Slow frequency reduction
Keep frequency
Slow frequency up 1HZ/10
Discharge temperature
Td
115°C
112°C
108°C
°C
105°C
C
95°C
C
93°C
Fast frequency reduction 2HZ/S
a e
q
y c
Fast frequency reduction 1HZ/S
Fast frequencrion 1HZ/10S
ast
frequenc
y
r
educt
ion 1HZ/S
Keep frequency
ast frequency r
Slow fre up 1HZ/10S
eep fre
quency
Common control
If it lasts 5 seconds, the unit will stop and alarm.
After standing by 3 minutes, unit can restart. If it
minutes, unit also stop and
S
TC’_cooling
65°C
64°C
61°C
59°C
55°C
e unit back to power.
HZ/S
if th
HZ/S
1HZ/10S