Haier HSU24VCK Service Manual page 13

(1)High temperature expiration prevention:When the temp.of coil pipe is above 161 °F,compre-
ssor andoutlet air stop running 10 seconds later, and inlet air runs as the temp. sensor is off. When
compressorstands by for 3 minute and the temp. of coil pipe is below 149 °F, the unit can be started again.
Protection of frost is available (disable in test run or heating mode): In order to prevent the indoor
heat exchanger from freezing (in refrigation or dehumidifying mode), the compressor will be shut off
When the temperature of the indoor coil pipe is or below 30 °F and the compressor runs for
minutes.When the temperature of the indoor coil pipe ascends to over 44°F, the compressor is restarted
(must meet a 3-minutes delay)
Timer on, Timer off and sleep control are available.
5.1.4 Dehumidifying mode
Temperature control range : 60°F ---86°F
Control character:
When Tr (indoor temperature) > Ts (temperature setting) +3 ° F, compressor and outdoor fan motor
run continuosly with indoor fan motor runnig in accordance with the wind speed setting(State 1)
When Ts ≤ Tr ≤ Ts +3 ° F, outlet air from compressor is on for 10 minutes and off for 6 minutes, the indoor
fan motor is off in 3 minutes after shut down of compressor and gives breeze in other time (State 2)
When Tr < Ts, outlet air from compressor is unavailable, and the indoor fan motor enter breeze mode 3
minutes later after after shut down of compressor (State 3)
.
When all the ranges alternate, there is ±1°F difference.
5.1.5 Timer function:
You can set 24-hour timer on or timer off as required, and the minum time unit is 1 minute. After
setting, the indicator of indoor unit is on , and it is off when timer setting is completed. There are several
timer mode as follows.
5.1.5.1 Timer on: The LED of "timer on" lights up, and unit behaves with halt status. Timer on is
completed, and then unit starts running with the LED of "timer on" off. The unit starts with the the last
setting receiving timer signals, and sleep setting is not allowed.
5.1.5.2 Timer off: Unit starts, timer indicator lights up; When reaching time setting, the indicator
goes out, unit enters shut down mode, and sleep function can be set. If timer off and sleep are set
synchronously, the one which time is short run first. Executing shutdown instruction clear timer and sleep
function.
5.1.5.3 Timer on and timer off can be set synchronously.
5.1.6 Sleep function: the timer indicator lights up.
5.1.6.1 In cooling/defrosting mode, the temp. setting increases 1° F one hour later after start up.
After another hour the temp. setting increase by more 1° F and then run continuously for another 6
HSU24VCK-SM
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11
Functions and Control
over 5
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DomesticAirConditioner