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23 1
10111
Module malfunction Module temp. over high
24 24
11000
Low pressure switch
failure
Low pressure switch acts for 30 seconds
contineously
No No No Temperature cutoff
protection
1˅Indoor pipe temp. is abnormal, outdoor default cooling temp. : 5ć, heating temp.: 40ć. The
above temperatures are normal.
2˅In defrosting, and in 3 minutes after defrosting is over, if sensor is abnormal, there will not alarm.
3˅Outdoor defrosting temp. sensor: when ambient temp. is below -5ć, detect after having start for 3
minutes.
7.2.9.12 Backup operation
Outdoor TC failure treatment: outdoor LED alarms, but the failure code will not be sent to other place,
the outdoor default TC is as follow: cooling temperature, 5ć; heating temperature, 40ć.
7.2.9.13 Special functions
1) Power operation
When receiving the Power operation signal from indoor, the unit will operate as the set
frequency by EEPROM. Fan speed will depend on the ambient temperature and the frequency.
When the Power signal is cancelled by indoor, the Power operation will stop.
2) Soft operation
When receiving the Soft operation signal from indoor, the unit will operate as the set frequency
by EEPROM. Fan speed will depend on the ambient temperature and the frequency. When the Soft
signal is cancelled by indoor, the Soft operation will stop.
3) Time shorting operation
When receiving the time shorting signal, the unit will perform the 1/60 time shorting operation.
4) Compulsory cooling operation
When receiving the compulsory cooling signal from indoor unit, the unit will execute the
compulsory cooling operation at the frequency sent from indoor. Only discharging temperature
protection and current protection are valid, all the other protections are invalid.
5) Oxygen bar: start after receive indoor oxygen bar signal, the outdoor motor should run at 1-class
speed when compressor stop.
6) Manual defrosting
When receiving the manual defrosting signal from indoor, the unit will enter the defrosting
operation immediately. The interval between two manual defrosts is at least 3 minutes. If the
communication protoco has not the set, this function is not available.
7) Rated, Middle, Minimal operation
When receiving the rated/middle/minimal operation signal from indoor, the unit will operate at
the frequency and fan speed set by EEPROM, meanwhile, all the protections are valid.
7.2.9.14 Outdoor indicator
Five-indicator combination shows the failure code.
4-bit dip switch: the normal position is ON.
First bit: OFF, compulsory cooling.
Second bit: OFF, compulsory heating.
Third bit: OFF, backup operation (outdoor ambient temp.).
Fourth bit: OFF, DC fan motor (ON, AC fan motor).
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