Midea M2OC-14HRDN1 Technical & Service Manual page 21

COOL_F9
COOL_F8
COOL_F7
COOL_F6
COOL_F5
If the current frequency is lower than COOL_F4, the frequency will not be limited.
After 10s of the compressor start, if the current>ICOOL,the AC will display the failure for 30 seconds
and stop. The AC will restart 3 minutes later.
Heating mode:
Current frequency
（Hz）
HEAT_F16
HEAT_F15
HEAT_F14
HEAT_F13
HEAT_F12
HEAT_F11
HEAT_F10
HEAT_F9
HEAT_F8
HEAT_F7
HEAT_F6
HEAT_F5
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.
6.5.5 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.
7.5.6 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
7.5.7 Outdoor unit anti-freezing protection
℃
When T2B<0 for 250 seconds
℃
T2B>10 .
7.5.8 Oil return
Running rules:
ICOOLLMT5
ICOOLLMT4
ICOOLLMT3
ICOOLLMT2
ICOOLLMT1
Current limit value（A）
IHEATLMT12
IHEATLMT11
IHEATLMT10
IHEATLMT9
IHEATLMT8
IHEATLMT7
IHEATLMT6
IHEATLMT5
IHEATLMT4
IHEATLMT3
IHEATLMT2
IHEATLMT1
and the compressor will restart after 3 minutes.
,the indoor unit capacity demand will be zero and resume to normal when
Frequency limit
Decrease the frequecny to HEAT_F4 and run at
HEAT_F4 for 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
demand).
ODMI-1103-A
via capacity