HEAT_F15
IHEATLMT11
3 minutes.
After that, the frequency will be adjusted according to the
capacity demand and rise to the upper level every 3 minutes
(When the frequency>Heat_F4 via capacity demand).
HEAT_F14
IHEATLMT10
HEAT_F13
IHEATLMT9
HEAT_F12
IHEATLMT8
HEAT_F11
IHEATLMT7
HEAT_F10
IHEATLMT6
HEAT_F9
IHEATLMT5
HEAT_F8
IHEATLMT4
HEAT_F7
IHEATLMT3
HEAT_F6
IHEATLMT2
HEAT_F5
IHEATLMT1
If the current frequency is lower than HEAT_F4, the frequency will not be limited.
After 10s of the compressor start, if the current>IHEAT, the AC will display the failure for 30 seconds and stop. The AC
will restart 3 minutes later.
8.5.5 Indoor / outdoor units communication protection
If the indoor units can not receive the feedback signal from the outdoor units for 2 minutes, the AC will stop
and display the failure.
8.5.6 High condenser coil temp. protection.
When T3>65
℃
for 3 seconds, the compressor will stop while the indoor fan and outdoor fan will continue.
When T3<52
℃
, the protection will release and the compressor will restart after 3 minutes.
8.5.7 Outdoor unit anti-freezing protection
For other models: When T2B<0
℃
for 250 seconds, the indoor unit capacity demand will be zero and resume
to normal when T2B>10
℃
.
For
，
KAM2-52 DN5
，
KAM5-120 DN5: When T2<4
℃
for 250 seconds or T2<0
℃
, the indoor unit capacity
demand will be zero and resume to normal when T2>8
℃
and the time of protection is no less than 3
minutes.
8.5.8 Oil return
Running rules:
1. If the compressor frequency keeps lower than RET_OIL_FREQ1_ADD for RET_OIL_TIME1_ADD, the
AC will rise the frequency to RET_OIL_FREQ2_ADD for RET_OIL_TIME2_ADD and then resume to
former frequency.
2. The EXV will keep 300p while the indoor units will keep the current running mode.
If the outdoor ambient is higher than TempT4HeatLimit_ADD during the oil return, the AC quit oil return.
