-113-
Resistance check
Resistance check
Conductivity check
using tester.
Conductivity check
using tester.
Conductivity check
Resistance check
Resistance check
Belt heater AC 200 to 240 V
MC1
1280
Ω
45 W
MC2 400: 1280
Ω
45 W
500: 1029
Ω
56 W
Code heater 2880
Ω
(1440
Ω
+ 1440
Ω
)
AC 220 to 240 V
20 W (10 W + 10 W)
AC 220 to 240 V
Not conducting: cooling cycle
Conducting:
heating cycle
Low-pressure shell scroll
type. Winding resistance:
each phase
1.215
Ω
(20
°
C)
8 HP
1.197
Ω
(20
°
C) 10 HP
2.94 MPa OFF setting
R
120
= 7.465 k
Ω
B
25/120
= 4057
Rt =
7.465exp{4057( - )}
R
0
= 15 k
Ω
B
1/80
= 3460
R
t
=
15exp{3460( - )}
0
°
C: 15 k
Ω
10
°
C: 9.7 k
Ω
20
°
C: 6.4 k
Ω
25
°
C: 5.3 k
Ω
30
°
C: 4.3 k
Ω
40
°
C: 3.1 k
Ω
Refrigerant heating inside compressor.
Refrigerant heating of accumulator
liquid level detection circuit.
Switching of cooling/heating cycle.
Controls heat exchanger capacity of
outdoor unit.
When there is a load that cannot be
adjusted by the variable capacity unit,
this function ensures the stable flow of
refrigerant.
Detect low-pressure pressure.
Perform low-pressure pressure
maintenance.
Detects high pressure.
Performs high pressure protection.
Detects discharge temperature.
Performs high pressure protection.
0
°
C: 698 k
Ω
60
°
C:
48 k
Ω
10
°
C: 413 k
Ω
70
°
C:
34 k
Ω
20
°
C: 250 k
Ω
80
°
C:
24 k
Ω
30
°
C: 160 k
Ω
90
°
C: 17.5 k
Ω
40
°
C: 104 k
Ω
100
°
C: 13.0 k
Ω
50
°
C: 70 k
Ω
110
°
C: 9.8 k
Ω
Detects accumulator refrigerant levels
by comparing the temperature
differences between TH9, TH3 and
TH4.
Frequency control.
Defrost control during heating
operations and liquid level detec-
tion.
Detects sub-cool of heat exchanger
outlet using HPS data and TH5 to
control LEV1.
CH11
CH12
crankcase
heater
CH2
CH3
Accumulator
liquid level
detection
21S4a
21S4b
MC
63LS
63H
TH11
(Discharge)
TH3
TH4
(Liquid level
detection)
TH5
(Pipe
temperature)
Heater
4-way
valve
Compres-
sor
Pressure
sensor
Pressure
switch
Thermistor
Name
Code
(Function)
Inspection method
Application
Product code
Specification
Outdoor unit (V
ar
iab
le capacity unit)
Outdoor unit (Constant capacity unit)
1
273+t
1
393
1
273+t
1
273
Con-
nector
Pressure
(0.3 V/MPa)
63LS
Connector
GND (Black)
Vout (White)
Vcc (DC 5 V) (Red)
Solenoid
vallve
Linear
expansion
valve
SV5b heat
exchanger
capacity
control
SV6
discharge-
suction
bypass
SLEV
(Oil return)
L E V 1
( S C coil)
Controls heat exchanger capacity of
outdoor unit.
Evaporation of liquid refrigerant inside
MC2.
Adjusts the rate of refrigerant (oil) re-
turning from the accumulator.
Adjusts the bypass flow rate from the
liquid piping of the outdoor unit during
cooling.
AC 220 to 240 V
Close: conducting
Open : not conducting
AC 220 to 240 V
Open : conducting
Close: not conducting
DC 12 V stepping motor drive
valve opening amount 0 to
480 pulse (Direct drive type).
Same as indoor unit
LEV. However, the
resistance value is
different than the in-
door unit.
Conductivity test
using tester
SV7b heat
exchanger
capacity control
(P400,500 only)
SV8b heat
exchanger
capacity control
(P400,500 only)
Controls heat exchanger capacity of
outdoor unit.
Controls heat exchanger capacity of
outdoor unit.
AC 220 to 240 V
Close: not conducting
Open : conducting
AC 220 to 240 V
Open : conducting
Close: not conducting
Conductivity test
using tester
.
0 ~ 0.98 MPa
Vout 0.5 to 3.5 V
1
2
1
2
1
2
1
2
3
