York EAHC-09 FS, Service Manual

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Over current protection
(2) Dehumidifying Mode
Working Conditions and Process of Dehumidifing
When T amb.> T2 , the unit will run under dehumidifying and cooling mode, in which case , the compressor, the outdoor fan
will run and the indoor fan will run at setting fan speed.
When Tpreset -2 ≤T
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amb.≤T2
, the unit will run under dehumidifying mode, in which case , the indoor fan will run at low
fan speed, the compressor and the outdoor fan will be stopped after 6 minutes and then restarted after 4 minutes, dehumidifying
process is repeated in cycle.
When T amb.< Tpreset -2 , the compressor and
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outdoor fan will be stopped and the indoor fan will run at low fan speed.
Under this mode, the reversing valve will be de-energized and the temperature can be set from 16 to 30 .
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The display shows
the signal of running ,cooling and the setting temperature.
T
preset
+2
ć
T
preset
̣ 2
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Cooling
Dehumidfying
Stop
min
.
min.
min.
min.
Outdoor fan
Compressor
Indoor fan
Low fan speed
Run
Stop
Protection Function
Antifreeze Protection
Other Protections
Other protections are same as the protection functions under the cooling mode.
(3)Heating Mode(
it's not available for cooling only unit )
Heating Conditions and Process
When T amb.≤Tpreset +2 , the unit will run under heating mode, in which case the reversing valve, compressor
and outdoor fan will be simultaneously started, and the indoor fan will be started to run at low speed after 2 minutes at most.
If Tamb.≥Tpreset +4 , the compr
ess or and the outdoor fan will be stopped, the reversing valve will keep energiz ing and
the indoor fan will be stopped after running at low speed for 60 seconds.
When 2 < T
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amb.< 4 ,the unit will maintain its
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f previous running status.
Under this mode, the temperature can be set from 16 to 30 .
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The display shows the signal of running,cooling as well as
the setting temperature.
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Tamb.
Under the dehumidif ying and cooling mode, when antifreez ing protection of the system is to be inspected, the compressor and
outdoor fan will stop running, and the indoor fan will run at low fan speed. When the antifreez ing protection is released and
the compressor has stopped for 3 minutes, the complete unit will resume its original status. After satisfying operation for 6 minutes
and stop for 4 minutes, when antifreez ing protection of the system is to be inspected, the compressor and outdoor fan will stop
running, and the indoor fan will run at low fan speed. When the antifreez ing protection is rel eased and the compressor has
stopped for 4 minutes, the complete unit will resume its original status.
When the system's current is inspected to be more than 22A for continuous 3 seconds, the main unit will enter into the status as
such that only the fan is running. After 3 minutes, if the overcurrent is eliminated, the complete unit will resume its original running
status. In case of the overcurrent protection happened for 6 times successively (for example: the compressor has run for more than 6
minutes continuously, the protection times will be cleared ), the complete unit will stop running and the main unit will enter
into the status that only the fan is running. At this time, it is required to turn off the unit by remote control ler and then the unit can
normally be started up . The nixie tube displays the error code "E5", and the running indicator light will blink (go out for 3S, and
blink for 5 times).
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