Carrier 42QHF009DS - Page 45

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VOLT_RST1_ADD
VOLTAGE
No limit
VOLT_LTM1_ADD
VOLT_RST2_ADD
VOLT_LTM2_ADD
VOLT_LTM_FREQ1_ADD
VOLT_LTM_FREQ2_ADD
Note: if the low voltage protection occurs and not resumes within 3min, it will keep the protection always
after restart the machine.
11.6.4 Compressor current limit protection
If the compressor current exceeds the current limit value for 10 seconds, the compressor frequency will be
limited as below table.
Cooling mode:
Current frequency（Hz）
Current limit value（A）
Frequency limit
COOL_F16
ICOOLLMT12
Decrease the frequency to COOL_F4 and run at COOL_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>COOL_F4 via capacity demand).
COOL_F15
ICOOLLMT11
COOL_F14
ICOOLLMT10
COOL_F13
ICOOLLMT9
COOL_F12
ICOOLLMT8
COOL_F11
ICOOLLMT7
COOL_F10
ICOOLLMT6
COOL_F9
ICOOLLMT5
COOL_F8
ICOOLLMT4
COOL_F7
ICOOLLMT3
COOL_F6
ICOOLLMT2
COOL_F5
ICOOLLMT1
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）
Current limit value（A）
Frequency limit
HEAT_F16
IHEATLMT12
Decrease the frequency 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 via capacity demand).
HEAT_F15
IHEATLMT11
HEAT_F14
IHEATLMT10
HEAT_F13
IHEATLMT9
HEAT_F12
IHEATLMT8
HEAT_F11
IHEATLMT7