Transcript L2GSN - Acson International

< L2GSN >
< Wall Mounted J Series >
Updated by:
Yap Boon Thiam
Technical Engineer
Email: [email protected]
Date: 9/5/2012
Page 1
PCB Layout
WM-J (10/15)
Page 2
PCB Connection Diagram
Outdoor coil sensor
Indoor coil sensor
+
CN_DISP
LED Display Board
IR Receiver
CN3
AS motor
4WV
OD fan
Fan motor
Page 3
Contents
1. Features
2. Operating Modes
3. Protections
Page 4
Features
1.1 Power Up Settings
1.2 Unit ON / OFF
1.3 Temperature Range and Settings
1.4 Sleep Function
1.5 Indoor Fan control
1.6 Louver Control
1.7 Fan Speed Selection
1.8 Turbo Function
1.9 Silent Function
Page 5
Features
1.1 Power Up Settings
• The system is configured to memorize settings prior to power
down.
• System will save updated settings into memory 10 seconds
after changes are confirmed.
• However, it will take 3 seconds to update memory if unit
changes from on to off state.
Page 6
Features
1.2 Unit ON / OFF
3 ways to turn on / off the system:
(a) On/Off Triggering
•
Emergency On/Off Button
- System mode setting will rotate in the following sequences
AP ….>OFF>AUTO (25°C,AUTO FAN)>OFF>…..
EC ….>OFF>COOL (25°C,AUTO FAN)>OFF>…..
•
On/Off button on wired (not applicable at the moment) /wireless
controller
Page 7
Features
1.2 Unit ON / OFF
(b) Delay timer
• Pressing the On/Off will reset the timer to 0 hour (not
applicable at the moment)
(c) Real time On/Off Timer
• Based on internal real time clock
• The timer settings are kept so that similar switches can
occur 24 hours later
• If emergency ON/OFF switch being press, then the timer will
be deactivated
Operation ON/OFF LED and buzzer respond in different way during
mode change
Page 8
Features
1.3 Temperature Range and Settings
•
•
Operating temperature range is 16°C to 30°C
Temperature setting is allowed in COOL, DRY, HEAT and AUTO modes
1.4 Sleep Function
•
•
Only available for COOL, HEAT & AUTO mode
This function will increase 2°C(cooling mode) or decrease 3°C
(Heating mode) of the set temperature with time
•
Change to another modes will inhibit SLEEP function and reset the
timer
Page 9
Features
1.4 Sleep Function (Cool Mode)
0
Tr
1/2
1
2
Hours since sleep set
Ts+2
Ts+1
Ts+1/2
Ts
SLEEP set on
Page 10
t (hr)
SLEEP set off
Features
1.4 Sleep Function (Heat Mode)
SLEEP set on
Tr
Ts
Ts-1
SLEEP set off
1/2
1
2
1/2
1
2 Hours since sleep set
Ts-2
Ts-3
0
Page 11
t (hr)
Features
1.5 Indoor Fan Control
• Indoor fan speeds are SILENT, LOW, MED, HIGH, TURBO or
AUTO FAN in COOL and HEAT modes
• In FAN mode, only HI, MED and LO speeds are allowed
1.6 Louver Control
• Stepper motor will only run when indoor fan runs
• Louver is set at max. closing position when unit is turned off
• If unit switches from OFF mode to ON mode, the louver will
stop at the last position when it goes from ON to OFF mode.
Page 12
Features
1.7 Fan Speed Selection
• In COOL and HEAT, the indoor fan speeds are SILENT, LO,
MED, HIGH, TURBO or AUTO FAN
• In FAN mode, only HI, MED and LO speeds are allowed
1.8 Turbo Function
• Available in COOL and HEAT modes
• When Turbo function is set, indoor fan will force to Turbo
fan for 20 minutes and working temperature for
- Cooling Cycle is offset Ts – 2˚C
- Heating Cycle is offset Ts + 2˚C
• If Turbo & Sleep function are activated at the same time, Sleep
mode timer will reset until Turbo function is clear
Page 13
Features
1.9 Silent Function
• Available in COOL and HEAT modes only
• When Silent function is set, indoor fan will force to Silent fan.
Page 14
Operating Modes
2.1 Cool Mode
2.2 Dry Mode
2.3 Fan Mode
2.4 Heat Mode
2.5 Defrost Mode
2.6 Auto Mode
2.7 Off Mode
Page 15
Operating Modes
Cold Start
• Cold start if: Units restarts 2 hours after it has stopped OR
during power-on reset start
• Not available in sleep mode, only available in heat and cool mode
• In cooling mode, offset temperature is -2°C
• In heating mode, offset temperature is +2
• After 20 minutes running or compressor cut-off (whichever earlier),
cold start will be terminated and resume to user setting
2.1 Cool Mode
• Compressor will cut in if Tr – Ts > 0.5˚C
• Compressor will cut out if Tr < Ts – 1.0˚C
Note:
Page 16
Tr = Room Temperature
Ts = Set Temperature
Operating Modes
2.2 Dry Mode
During the 1st 12 minutes of the DRY mode run from:
i) Cold start OR
ii) Mode change from HEAT, FAN or AUTO HEAT
•
•
DRY mode must run under COOL mode with Auto Fan Speed
for 12 minutes OR
Run Until Tr < Ts – 1°C
After the 1st 12 minutes
• DRY mode will run either Zone A, B, C or D (depend on temp.
condition)
Page 17
Operating Modes
2.2 Dry Mode
ZONE A
: if Tr - Ts > 2 o C
ON
Compressor
OFF
ON
Low Fan
OFF
12 Minutes
Page 18
Operating Modes
2.2 Dry Mode
ZONE B
: if 0°C < Tr - Ts < 1°C
ON
Compressor
OFF
8 min
4 min
ON
Low Fan
OFF
30 sec
Page 19
30 sec
12 Minutes
Operating Modes
2.2 Dry Mode
ZONE C
: if 1°C < Ts - Tr < 2°C
ON
Compressor
OFF
6 min
6 min
ON
Low Fan
OFF
30 sec
Page 20
30 sec
12 Minutes
Operating Modes
2.2 Dry Mode
ZONE D
: if Ts - Tr > 3°C
ON
Low Fan
OFF
30 sec
ON
Compressor
OFF
12 Minutes
Page 21
Operating Modes
2.3 Fan Mode
• Only HI, MED and LO speeds are allowed.
• The compressor and the outdoor fan will stop.
• The 4-way valve will turn off also.
2.4 Heat Mode
2.4.1 Heat Pump Model
-
Compressor will cut in if Tr < Ts + 1.0˚C
Compressor will cut out if Tr –Ts > 3.5˚C
Note:
Page 22
Tr = Room Temperature
Ts = Set Temperature
Operating Modes
2.4 Heat Mode
2.4.2 Hot Start
The indoor fan speed modulate according to the Tin coil
- If Tin coil > 40˚C, indoor fan run at user set speed
- If Tin coil < 18˚C, indoor fan stop
- If Tin coil crosses 30˚C, indoor fan change to silent fan speed
Note : Tin coil = Indoor Coil Temperature
Page 23
Operating Modes
2.4 Heat Mode
2.4.3 Hot Keep
• When compressor cuts out, the indoor fan will runs according
to hot keep options.
• There are only 1 option of Hot Keep: Fan Off Option
Fan Off Option
 If Tin coil > 40˚C, indoor fan run at set speed
 If Tin coil crosses 37˚C, indoor fan run at silent speed
 If Tin coil < 30˚C, indoor fan stop
Page 24
Operating Modes
2.4 Heat Mode
2.4.4 4-Way valve Changing
• To run heat mode, 4-way valve MUST turn ON.
• 4-way valve can only be changed from ON to OFF or vice-versa
150 seconds after the compressor has cut out.
• Then the compressor cut in after 4 sec.
2.5 Defrost Mode
• Defrost mode can only be declared under heat mode.
• Defrost timer start counting when OD coil temperature < +3°C
• Upon crossing over +5°C or higher more than 150 sec, timer will
reset.
• Temp. sensing can be done when compressor run time > 2 min
Page 25
Operating Modes
2.5 Defrost Mode
To deg C
+3
+2
C
P13
0
0
P17
P15
time
P16
B
P14
A
P12
Page 26
Defrost mode if more than
3 minutes
Operating Modes
2.5 Defrost Mode
• Defrost mode will start if compressor run time is :
i)
ii)
iii)
30 mins to 60 mins below +3°C, if OD coil temperature is <=-8°C
for > 3 min (compressor ON)
60 mins to 120 mins below +3°C, if OD coil temperature is <=-4°C
for > 3 min (compressor ON)
>120 mins below +3°C, if OD coil temperature is <=-2°C
for > 3 min (compressor ON)
• If unit in OD fan forced off mode, defrost mode is not allowed to declare.
Page 27
Operating Modes
Defrost Cycle
C2.4 version
• RMODE 7.5k ohm resistor
• Indoor fan, auxiliary heater, outdoor fan, 4WV cut off while
compressor remain on.
• Defrost mode terminate when
1) OD coil temperature > 10°C or
2) minimum 10 minutes compressor run time
• Compressor cut out at the end of defrost cycle, 4WV on after
50 seconds.
• Compressor can cut in after 10 seconds.
Page 28
Operating Modes
2.6 Auto Mode
Under Auto mode, COOL & HEAT mode can be changed automatically
depending on room & set temperature.
(a) If the present Auto mode is COOL,
( Mode Set Temperature = User Set Temperature)
COOL
HEAT
IF
i)
ii)
Page 29
Tr <= Ts mode- 3.5°C AND
The compressor has cut out for at least 10 mins
Operating Modes
2.6 Auto Mode
(b) If the present Auto mode is HEAT,
( Mode Set Temperature < User Set Temperature-1.5°C)
HEAT
COOL
IF
i)
ii)
Tr > Ts mode + 3°C AND
The compressor has cut out for at least 10 mins.
2.7 Off Mode
• No LED indication when unit is turned off.
• All relays is turned off immediately after ON/OFF triggering except 4
way valve (subject to 4WV switching time protection).
Page 30
Protections
3.1 Compressor
3.2 Outdoor Fan Speed Control
3.3 Indoor Anti Freeze
3.4 Gas Leak (Outdoor unit abnormal)
3.5 Fan Lock
Page 31
Protections
3.1 Compressor
(a) 3 minutes Minimum OFF time
•Compressor can only cut in after a minimum period of 3 mins from
the time it cuts off except during valve changeover sequences.
• There shall have a minimum delay timer of 2 sec between outdoor
fan & compressor when both turn on.
b) Compressor Random Restart
• With memory backup selection, compressor
cut in 0-64 sec after
power up again.
• Compressor cut in is subjected to thermostat cut in mode.
Page 32
Protections
3.1 Compressor
(c) Compressor Minimum Run Time
• Compressor
can only cut out after minimum 3 mins of running in
current mode.
• Compressor can cut out at any time is system
is switched to other
modes or other protection sequences.
(d) Compressor Overload Protection
• Method to detect compressor overload is by coil sensor detection.
Page 33
Protections
3.1 Compressor
(e) Coil Sensors Detection
Cooling Cycle
Comp & OD Fan
ON
OFF
OD coil temp 68
oC
Heating Cycle
Comp, OD Fan
& 4WV
ON
OFF
ID coil temp 68
Page 34
oC
Protections
3.2 Outdoor Fan Speed Control
(a) Heating Mode
– Outdoor fan will cut off, if indoor coil temperature > 55˚C
– Outdoor fan will resume, if indoor coil temperature < 50˚C
(b) Cooling Mode
– Outdoor fan will run when compressor has cut in.
Page 35
Protections
3.3 Indoor Coil Anti Freeze
Available in COOL mode only
• IF ID Coil Temp reaches 1°C and below for at least 1 min
AND compressor has run for at least 10 minutes.
ON
Comp & OD Fan
1 oC
OFF
• IF ID Coil Temp reached 10˚C and above for at least 1 min.
Comp & OD Fan
ON
10oC
Page 36
OFF
Protections
3.4 Gas Leak (Outdoor unit abnormal)
This option is selected via resistor RGL
• Gas leak is declared if ID coil temp. is >25°C in cooling cycle
OR < 20°C in heating cycle.
• System will check the gas leak mode if compressor run time of
30 mins achieved.
• If these condition is met, the system will reconfirm ID coil temperature
for 5 mins in cool mode OR 5 mins in heat mode before declaring gas
leak mode.
• No gas leak checking during outdoor defrost. Compressor run timer is
reset.
Page 37
Protections
3.5 Fan Lock
• When there is no feedback from ID fan, unit will wait for 10 sec.
• After 10 sec, counter in the software will increase by one.
• Then LED will start blinking to indicate error of the unit while the
compressor and OD fan are allowed to on depend on thermostat
cycle.
• If there is no fan speed feedback error continue for another 30 sec,
compressor and OD fan will be forced off.
• LED will continue blinking and louver is allowed to operate.
Page 38
Thank You
Page 39