-36-
Function According to Switch Operation
Switch Set Timing
When Off
When On
When Off
When On
SWU 1 ~ 2
SW1
1 ~ 8
8 ~ 9
8 ~ 9
5 ~ 6
Refer to LED monitor displa
❇
table 1
❇
table 1
❇
table 1
y on the outdoor board.
9 ~ 10
9 ~ 10
SW2
1
2
3
4
7
10
SW3
1
2
3
4
5
6
7
10
SW4
1
2
3
4
5
6
-
Centralized control not
connected.
Storing of refrigeration
system connection
information.
Store IC·OC error history.
Ordinary control
-
Ordinary control
-
When the CS circuit is
closed, that time is totaled.
SW3-2 Function Invalid
Stop all indoor units.
– 8
°
C
7
°
C
Ordinary control
Ordinary control
-
Model 400
SW4-3 Function invalid
Display variable capacity
unit operations.
Big Y Setting
-
[5] Function of Dip SW and Rotary SW
(1)
Outdoor unit
PUHY-P600·650·700·750
YSEM-A
.
PUHY-P400·500
YEM-A
.
MAIN board
-
Centralized control
connected.
Deletion of refrigeration
system connection
information.
Erase IC·OC error history.
• Refrigerant volume
adjustment operation.
• Ignore liquid level errors
-
Start forced defrosting.
-
Timer Reset
SW3-2 Function Valid
All indoor units test run
ON.
– 10
°
C
12
°
C
Pump Down Operation
High pressure/1.5 ~ 2.5 K
higher than normal
-
Model 500
SW4-3 Function valid
Display constant capacity
unit operations.
Super Y Setting
-
Changes as shown below by on
→
off change
0 %
→
3 %
→
6 %
→
9 %
→
12 %
→
– 6 %
→
– 3 %
→
0 %
Unit Address Setting
For self diagnosis/
operation monitoring
-
Centralized Control
Switch
Deletion of connection
information.
Deletion of error history.
• Adjustment of Refriger-
ant Volume
• Ignore liquid level errors
-
Forced defrosting
-
Reset of the time the CS
circuit is closed.
SW3-2 Function Valid/
Invalid
Indoor Unit Test Operation
Defrosting start tempera-
ture .
Defrosting end tempera-
ture.
Target low-pressure
change
Pump Down Function
Target high-pressure
change
-
Models
SW4-3 Function valid/
Invalid
Change service LED
Configuration compensa-
tion
Auto changeover function
value
Switch
Target low-pressure change
Models
-
-
Switch
Function
During normal
operation when
power is on.
Invalid 2 hours
after compressor
starts.
Before power is turned on.
-
Before power is turned on.
Before power is turned on.
During normal operation when
power is on.
-
-
During normal operation when
power is on.
During normal operation when
power is on.
When SW3-1 is ON after power is
turned on.
During normal operation when
power is on.
During normal operation when
power is on. (Except during
defrosting)
During normal operation when
power is on.
While the compressor is stopped.
During normal operation when
power is on.
-
When switching on the power.
When switching on the power.
During normal operation when
power is on.
During normal operation when
power is on.
When SW4-1 is ON
-
-
-
Bef
Ordinary control
Auto changeover Valid
When switching on the power
ore power is turned on.
-
-
During normal
operation when
power is on.
10 minutes or
more after
compressor
starts.
Set on 51 ~ 100 with the rotary switch.
✻
2
Note 1: Factory setting is SWU 1 to 2 = 00, SW3 - 10 = set by model.
Note 2: If the address is set from 01 to 50, it automatically becomes 100.
Note 4: When Auto changeover function is valid, Operating mode is
decided by the indoor unit which address number is minimum.
Note 3: Factory settings are SW4-6 = OFF, setting = BIG Y.
When operating in Super Y mode, turn SW4-6 ON.
All other switches are set to OFF.
1
Variable capacity unit
7 ~ 8
Evaporation temp. (˚C)
Dip SW
0 ~ 4
3 ~ 5
4 ~ 7
4 ~ 8
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
–1 ~ 3
–5 ~ 1
–6 ~ 0
–2 ~ 2
–4 ~ 2
–7 ~ –1
–8 ~ –2
