Carrier 42HVM109303 Service Manual page 39

For 18k,24k models:
Compressor
4-way valve
Outdoor fan
Indoor fan
Indoor fan breeze(10s)
XX=90s
8.4.3.5 Evaporator coil temperature protection
℃ the compressor running frequency decreases to the lower level and runs for 20s.
----T2> TEH2 ,
When the frequency decreases to F2 and the T2 is still over TEH2
stop.
℃
----T2<48 or T2 stays in 48 ~
℃
----T2>60 , the comp
8.4.4 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between
℃
17~30 .
In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts).
Frequency F2
on
off
on
off
on
off
on
off
℃ TEH2 ℃
for 6 minutes, the frequency will not be limited by T2.
ressor will stop and restart when T2<48 .
ΔT=T1-Ts
ΔT＞1℃
Frequency F8
10s
xx
10s
no longer than 10m
℃
39
30s
℃
for 3 minutes, the compressor will
Running mode
Cooling