DM16-01.01.11-01en Service manual
Multi DC inverter R410A. Outdoor unit 31
Bit4
Frequency limit caused by T2.
Bit5=1, Bit3=1,
Bit1=1.
It means
frequency limit
caused by T4,T3
and current.
Bit3
Frequency limit caused by T3.
Bit2
Frequency limit caused by T5.
Bit1
Frequency limit caused by current
Bit0
Frequency limit caused by voltage
43 Average value of T2 (Sum T2 value of all indoor units)/( number of indoor units in good
connection)(cooling:T2B, heating:T2)
44 Outdoor unit fan motor state Fan off:0, High speed:1, Med speed:2, Low speed:3 Breeze:4, Super
breeze:5
45 The last error or protection code 00 means no malfunction and protection
10.5 Protection
10.5.1 Three minutes delay at restart for compressor.
10.5.2 Temperature protection of compressor discharge.
When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules:
T5
Compressor off
Frequency lim it
Normal
Frequency holding
10.5.3 Low voltage protection
VOLTAGE
No limit
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.
10.5.4 Compressor current limit protection
Temperature interval.of current limit is same as range of T4 limited frequency.
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