Hyundai HSH-121NBE, Service Manual

Page: 187 / 259

When evaporator tube temperature is detected too high, the outdoor fan will stop running; when
the temperature returns to normal, the outdoor fan will resume running.
‹
Noise protection
When “run/stop” is used to shut down the machine or convert mode, the reversal valve delays two
minutes to stop.
④
Overcurrent protection
Overcurrent protection is the same with that in COOL mode (but the indoor fan will runs at
remaining heat)
(4) FAN mode
In this mode, the indoor fan runs at the set speed, and the compressor, outdoor fan and four-way
valve stop running.
¾
In this mode, the temperature setting range is 16 ~30
℃
. The monitor displays running
symbol and set temperature.
(5) AUTO mode
In this mode, the system selects running mode (COOL, HEAT and FAN) automatically according
to the change of ambient temperature. The monitor displays running symbol, actual running
symbol and set temperature. Mode conversion has 30 seconds’ delay for protection. Protection
function is the same with that in each mode.
3. Other control
(1) Timer control
The main board has both ordinary timing function and moment timing function at the same time.
Timing function is chosed by providing remote control with different functions.
①
Ordinary timing:
Timed startup: set the function of timed startup in the state of shutdown. When the timed startup
time is reached, the controller runs in original set mode. The timing interval is 0.5 hours. The
setting range is 0.5 to 24 hours.
Timed shutdown: set the function of timed shutdown in the state of starting up. When the set time
is reached, the system shuts down. The timing interval is 0.5 hours. The setting range is 0.5 to
24hours.
③
Moment timing:
Timed startup: if the system is set with timed startup during operation, the system continues to run;
if the system is set with timed startup in the state of shutdown, when the set time for timed startup
is reached, the system starts to run in pre-set mode.
Timed shutdown: if the system is set with timed shutdown in the state of shutdown, when timed
shutdown is set, the system keeps standby; if the system is set with timed shutdown in the state of
startup, when the set time for timed shutdown is reached, the system stops working.
Timing change:
The system can set startup and shutdown through remote switching key and also reset timing
when it is in the timing state. The system runs in the state set finally.
When the system is in running state, and timed startup and shutdown are set simultaneously, the
system maintains current operation condition. When set time for timed shutdown is reached, the
system stops working.
When the system is in stop state, and timed startup and shutdown are set simultaneously, the
185