Haier H2SM-(9+12)HV03/R2 Service Manual page 51

i) The outdoor fixed frequency is set according to the indoor system signals. The operation
is on the frequency stored in EEPROM
ii) The cooling and heating value under the double system operation
Under the single system fixed frequency test, the outdoor system will operate according to
the turned-on indoor system status. The operation will on the frequency relative to the status.
Under the double system operation test, the outdoor system will automatically operates on the
double system fixed test frequency.
1.7.2 Normal operation frequency control
Under the outdoor system normal operation, the fixed frequencies of different indoor systems
should be tested according to the different capacity of the respective indoor systems. Then
the outdoor system will decide the operation frequency according to the fixed frequencies,
the difference between set temperature and the indoor temperature and the indoor fan speed.
1.8 malfunction and protection
1£ ® 8£ ® 1 Three minutes¡ ¯
1) No matter caused by which condition, the outdoor compressor is not allowed to be restart
within 3 minutes after a compressor shut down.
2) If the compressor shut down is caused by malfunctions and the malfunction is corrected
3 minutes after, the compressor can restarted of the correction at once.
1.8.2 Intelligent power module protection.
i) Under the compressor operation, if the IPM protection happens under the voltage over/under
loading, over heating or current overcharge, the compressor will stop and restart 3 minutes
later.
ii) If the IPM protection happens 4 times continuously, the compressor will be totally turned
off and can be restarted only by a second connection to the power supply.
1.8.3 Sensor malfunction protection.
i) There are 6 sensors in the outdoor system. The outdoor system will stop if any of the six
sensors has malfunctions. The malfunction will be reported respectively.
ii) After the malfunction has been corrected for 3 minutes, the system can be restarted.
Outdoor restriction condition codes display:
When the outdoor system operates, because of the various temperature or electrical device
restrictions, the compressor has to ensure the maximal output within a safe frequency range.
This restriction condition only represent the most possible condition at the time, can only
be used as a reference in experiments.
1# Normal, no restriction
2# Power voltage restriction
3# outdoor heat interaction restriction under the cooling mode; indoor heat
interaction under the heating mode.
4# main current restriction
5# outlet temperature restriction
6# indoor heat interaction temperature restriction. (frosting prevention)
7# Indoor fan speed restriction
8# Outdoor frequency conversing voltage restriction
1.8.4 The malfunction codes£ º
Air Conditioner
waiting mode protection
47
Edition:2006/1/10