Energolux SAD48HD1-A, Service Manual

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Light commercial(High ESP Duct 196Pa) Service Manual
48
Sleeping in heating operation
：
◇ Long distance control
a) Control board has function of long distance control
b) The switch of long distance control can be
masked
through indoor unit DIP switch.
c) When long distance switch is off and unit turns off, the remote controller and wired controller
shall not be able to turn on the unit.
d) When long distance switch is on and unit starts in auto mode, mode can be changed by remote
controller or wired controller.
◇ Self -check operation
Press the forced switch at the same time power on, the buzzer sounds twice and enters into
self-check operation process
Electric heating motion, indoor fan operates at high speed
→ operation lamp light for 1s → timing
lamp light for 1s → power lamp light for 1s → indoor fan runs at low speed and medium speed both
for 1s → compressor motion 1s → four ways valve motion 1s → outdoor motion 1s → buzzer sounds
once then close and unit enters into ready state, ending self-check.
3.2 Control function
◇
Anti-freezing protection
a) The protection is to prevent indoor evaporator from frosting in large area.
b) When indoor coil temperature ≤ -2 and lasts for 10s, in addition, the compressor keeps running
for 5 min or longer, the compressor and outdoor fan stops running, indoor fan runs at setting
speed.
c) If indoor coil temperature ≥ 7
℃
, unit quits the protection, once the compressor meets 3 min
protection the unit restart.
d) This function is valid only when cooling or dehumidifying.
◇
Anti over-heating protection
a) This protection is to avoid wind temperature is too high in heating to cause user feel
uncomfortable.
Temperature
Raises by 1
℃
Raises by 1 ℃ again
1h
2h
7h
（
Sleeping finished
，
shutdown
）
Original set
temperature
Temperature
Original set
temperature
Descends by 2
℃
Descends by 2 ℃ again
1h 2h
7h
（
Sleeping finished
，
shutdown
）