Haier HSU-18,22HVA103/R2(DB) Service Manual page 23

The fan motor is working slightly weak when the heat exchange temperature is above 28 ℃ and
below 35℃
The fan motor is working weak if the he heat exchange temperature remains 35℃ for less than 4
minutes.
The fan motor works as set if the he heat exchange temperature remains 35℃ for more than 4
minutes
The fan motor works as set if the he heat exchange temperature remains above 38℃
5．1．2．2 When the compressor stops and remains idle for 3 minutes
20 seconds after the compressor stops, the up wind volume is weak (switching to SSLO in silent
running mode) and then slightly weak. While the down wind volume is stoped
If the compressor stops when the heat running starts, the wind volume is weak
5．1．2．3 High Work-intense protection control
Under the heating mode, the high work-intense protection will be carried out according to the
heat-exchange temperatures as shown in the table below.
High Work-intense protection control:
Heat-exchange temperature
THHEAT6 74.7
THHEAT5 70.3
THHEAT4 65.1
THHEAT3 62.2
THHEAT2 52.9
THHEAT1 51.6
THHEAT0 47.1
Indicated Normal
frequency
High Work-intense protection
High Work-intense protection alarm will start if there are two times of high work-intense protection
within 30 minutes.
If the heat-exchange temperature does not reach THHEAT 2, it will resume to the normal temperature
level control
The smaller one of the high work-intense frequency and level frequency will be the operation data.
5．1．2．4 Low Work-intense protection control
Specification for heat-exchange temperature sensor
B fixed number=3700 R(25℃)= 10KΩ
Under the cooling /moisture removing modes, the low work-intense protection will be carried out
according to the heat-exchange temperatures as shown in the table below.
18 2 HVA103/R2(DB)
frequency values when the high work-intense starts
C D E stop D C B
22
A B C D E stop
High Work-intense
protection alarm