York EAHC-09 FS User manual
High Wall
EAHC 9 to 24 FSAAR
EAHC 9 FSAAF
SERVICE MANUAL
SM-EAHC-09-24-FS-GB 06-08
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ÜÝÞ
PCB function manual and operation method
PCB function manual and operation method
Manual of functions of controller
Temperature Parameters
2 Busic Functions of System
Indoor setting temperature (Tpreset)
Indoor ambient temperature (T
amb.)
Once energized, the compressor should in no way be restarted unless after at least 3-minute time interval. If the unit is with memory
function, for the first energization, the compressor will be started without 3-minute lag;if being under the condition of power-off,
the compressor will have 3-minute delay to be started under the condition of power-on. Once started, the compressor will not be
stopped within 6 minutes with the changes of room temperature.
(1) Cooling Mode
Cooling Condition and Process
When Tamb. Tpreset+1 , the unit will run under cooling mode, in which case,the compressor and outdoor fan will be
run, and the indoor fan will run at setting fan speed.
When Tamb. Tpreset -1 , the compressor and the outdoor fan will be stopped, in which case,the indoor fan will run at setting
fan speed.
When Tpreset -1 <Tamb.< Tpreset +1 , the unit will maintain its original running status.
Under this mode, the reversing valve will be de-energized and the temperature can be set from 16 to 30
.
The display
shows the signal of running,cooling as well as the setting temperature.
T
preset
+1
T
preset
1
T
amb
Start cooling
Original running status
Stop cooling
min
.
min
.
min
.
Compressor
Outdoor fan
Indoor fan setting fan speed
Run Stop
Protection function
Antifreeze Protection
During antifreeze protection
Compressor
Outdoor fan
Indoor fan
min
setting fan speed
Run Stop
If it is detected that the system is under antifreezing protection, the compressor will be stopped, and the indoor fan will run at setting
fan speed. When antifreezing protection is released and the compressor has stopped for 3 minutes, the unit will resume its original
running status.
ÜÞß
Overcurrent protection
(2) Dehumidifying Mode
Working Conditions and Process of Dehumidifing
When T amb.> Tpreset +2 , 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 ≤Tć
amb.≤Tpreset +2 , 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
ćoutdoor 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 .ćThe display shows
the signal of running ,cooling and the setting temperature.
Tpreset+2ć
Tpreset2ćCooling
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 compressor and the outdoor fan will be stopped, the reversing valve will keep energizing and
the indoor fan will be stopped after running at low speed for 60 seconds.
When Tpreset+2 < T
ć
amb.< Tpreset+4 ,the unit will maintain its
ć
fprevious running status.
Under this mode, the temperature can be set from 16 to 30 .ć
The display shows the signal of running,cooling as well as
the setting temperature.
ććććć
Tamb.
Under the dehumidifying and cooling mode, when antifreezing 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 antifreezing 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 antifreezing 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 antifreezing protection is released 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 controller 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).
ććć
This manual suits for next models
3
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