Haier HPU-42CV03 Service Manual page 47

In heating mode, after running at SLEEP mode for 1 hour, the set temperature
reduces 2℃, another 1 hour later, the set temperature will reduce 2℃, and another 3
hours later, the set temperature rises 1℃; the unit continues running for 3 hours, then the
unit will stop.
8. Compulsory cooling operation
After the panel receives the compulsory cooling signal, the unit enters the compulsory
cooling state. and indoor/outdoor motors are in high speed; in the 5 minutes, the system
will not adjust the protection and not be limited by the ambient temperature, but the
compressor will be limited by 3-minute protection. 5 minutes later, the unit will enter the
normal cooling state.
9. System protection
9.1 3-minute protection for compressor startup
After the compressor stops, at least 3 minutes later, the compressor can restart up; if
the unit is powered off in running less than 3 minutes, after being electrified, 3 minutes
later, the compressor can restart up. Being electrifed for the first time, there is no 3-minute
delay protection.
9.2 Sensor failure protection
9.3 Communication failure protection
10. Panel selection
Select the panel according to the 2 dip switch
Style of panel
Cabinet V panel
Cabinet Z panel
Wired controller
Commercial Air Conditioner
Setting temperture
Ts+2
Ts+1
Ts
1 2
Setting temperture
Ts
Ts-2
Ts-3
Ts-4
1 2
1
OFF
ON
ON
46
SLEEP time
8
SLEEP time
5 8
2
ON
OFF
ON
Model: HPU-42CV03
HPU-42HV03