3
GB
2. Refrigerant Oil Recovery Operation Flow
2.1 Refrigerant oil recovery operation monitor display
(*1) The initial remaining time that indicates the refrigerant oil recovery is 80. A countdown will start on step 3 in the cooling mode.
The countdown does not include the time for checking the refrigerant charge amount.
(*2) S-1: Refrigerant oil recovery complete, S-0: Refrigerant oil recovery incomplete,
r-1: Refrigerant charge adjustment complete, r-0: Refrigerant charge adjustment incomplete.
1. How to read the LED on the service monitor
Units' operation status can be monitored on the LED display by setting the dipswitches SW1-1 through 1-10 on the MAIN board of the
outdoor units.
Four 7-segment LEDs are used to display numerical values, flags, and alphabets to display various information.
The LEDs display such information as pressure and temperature in numerical values and operating conditions and the ON/OFF status of
solenoid valve as flags.
●
Display of numerical values
Example:When the pressure sensor reads 18.8 kg/cm
2
G (Item No. 58)
* The unit of pressure is in kg/cm
2
G.
* Use the following conversion formula to convert the displayed value into a value in SI unit (MPa).
SI unit (MPa) = Displayed value (kg/cm
2
G)
0.098
●
Flag display (Each set of two lines in vertical alignment indicates a flag.)
Example:Outdoor unit in the 3-minute restart delay mode. (Item No. 14)
2. Table of items that can be monitored on the LED on the outdoor unit circuit board
No
SW1
Display content
LED display
Notes
1
2
3
4
5
6
7
8
9
10
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 LD9 LD10
58
0
1
0
1
1
1
0
0
0
0
High pressure (kgf/cm
2
G)
-99.9 to 999.9
59
1
1
0
1
1
1
0
0
0
0
Low pressure (kgf/cm
2
G)
-99.9 to 999.9
60
0
0
1
1
1
1
0
0
0
0
Intermediate pressure
(kgf/cm
2
G)
-99.9 to 999.9
45
1
0
1
1
0
1
0
0
0
0
Discharge temperature (°C)
-99.9 to 999.9
131
1
1
0
0
0
0
0
1
0
0
Refrigerant oil recovery operation
steps
rEP
steps
Reversed
display
122
0
1
0
1
1
1
1
0
0
0
Refrigerant oil recovery
remaining time
(*1)
0 to 9999
120
0
0
0
1
1
1
1
0
0
0
Refrigerant oil recovery
completion indicator flag
Refrigerant charge adjustment
completion indicator flag
S-1 (0)
r-1 (0)
(*2)
Reversed
display
7SEG LED
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
WT06218X01_en.fm Page 3 Tuesday, December 14, 2010 4:19 PM
