Haier HPU-42CV03 Service Manual page 46

the fan blade can swing or be fixed on one position. You can set TIMER or SLEEP mode.
Overheat protection
In heating mode, compressor has started up and indoor motor has run for over 30
seconds, if indoor coil temperature Tg>56℃, outdoor motor will chenge to LOW; if Tg<52
℃, and outdoor motor has stop for 45s, outdoor motor will run again; if indoor coil
temperature Tg>60℃, outdoor motor will stop; if Tg<56℃, and outdoor motor has stop for
45s, outdoor motor will run again; if Tg>68℃, the compressor will stop and indoor motor
will run according to the thermostat OFF state. After the compressor stops for 9 minutes
and Tg reduces to 48℃, the unit will resume to heating mode, and the compressor and
the outdoor motor will run again.
Anti-cold air function in heating mode
When the uint enters heating mode for the first time, or last defrosting is over, if Tg＜
28℃, indoor motor will stop; if 38℃>Tg≥28℃, indoor motor will run at low speed; if Tg≥
38℃ or the compressor has run for over 4 minutes, indoor motor will run at the set speed.
Blowing remaining heat function
In heating mode, the thermostat is OFF, the compressor stops, indoor motor will run
at low speed at least 50 seconds.
Auxiliary electric heating function
Enter condition:
1) Tr≤Ts-2℃
2) compressor ON and running for 1 minute
3) Tr≤23℃
4) Indoor motor running
5) Electric heating function start signal available (cancelled)
If the above conditions can all be met, the electric heating function will work.
If one of the below conditions can be met, the electric heater will stop:
1) Tr≥Ts-1℃
2) compressor OFF or indoor motor stops
3) Tr≥25℃
4) Electric heating function start signal not available (cancelled)
Manual defrost:
In heating mode, the set temperature 30℃ and in high speed, in 5 seconds, press
SLEEP button 6 times continuously, then the buzzer will sound 3 times, you can enter the
manual defrosting.
For the unit with auxiliary electric heating function, If the auxiliary electric heating
function is working when the defrosting condition is met, please stop electric heater firstly,
3 seconds later, defrosting can begin.
7. SLEEP function
Sleep function can be setted in COOLING, DRY and HEATING mode. in cooling or
dry mode, after running at SLEEP mode for 1 hour, the set temperature will rise 1℃,
another 1 hour later, the set temperature will rise another 1℃; the unit continues running
for 6 hours, then the unit will stop.
Commercial Air Conditioner
45
Model: HPU-42CV03
HPU-42HV03