Outdoor Temperature Limit; Special Features - Haier HSU18VHJ(DB) Service Manual

5.2.6.4 Outdoor Temperature Limit

Cooling: When outdoor temperature is lower than 23 , cooling operation will start, compressor
frequency is limited to less than 50 HZ, outdoor wind speed is forced at level 1.
Heating: When outdoor temperature is higher than 18 , heating operation will start, compressor
frequency is limited to less than 53 HZ, outdoor wind speed is forced at level 1.

5.2.6.5 Special Features

1. Forced Cooling: When receiving indoor forced cooling signal, cooling operation will start in a
frequency signaled by indoor unit. Only air discharge temperature and over current protection features
are effective and other protection features are invalid.
2. Rated, Middle and Minimum Capacity Operation: When receiving indoor, rated, middle and
minimum capacity operation signal, outdoor unit will operate as per wind speed and frequency set by
EEPROM and all the protection features are effective.
5.2.6.6 Fault Display and Treatment
In case outdoor unit faults, the alarm indicator lamp will blink and blink frequency is 1HZ Time interval
between blink cycles is 3s.
Alarm indicator lamp is off when there is no fault.
HSU12/18VHJ(DB)
29
Domestic Air Conditioner