Справочник Пользователя для Mitsubishi Electronics P500YMF-C

–57–

1

Detects the outdoor air temperature.

2

Performs fan control, liquid level
heater control, opening settings of
LEV for oil return and other functions.

Thermistor

R

0 

= 15 k

Ω

B

1/80 

= 3460

Rt =
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

Resistance check

TH6
(Outdoor
temperature)

TH7
(Pipe inlet
heat ex-
changer
 temperature)

Outdoor unit

Name

Code

(Function)

Inspection method

Application

Product code

Specification

1

273+t

1

273

1

273+t

1

273

1

273+t

1

273+120

1

273+t

1

323

Resistance check

TH3
TH4
(Liquid level
detection)

TH5
(Pipe
temperature)

Detects liquid level of refrigerant inside
accumulator using the differences
among TH2, TH3, TH4.

1

Frequency control.

2

 Controls defrosting during heating.

Resistance check

Conductivity test
using tester

TH10

1) Detects the compressor shell

temperature.

2) Provides compressor shell over-

heating protection.

Inverter cooling fan control using THHS
temperature.

1

Capacity control of high/low
pressure bypass when starting and
stopping.

2

Discharge pressure rise suppression.

Switching of capacity control valve inside
No. 2 compressor (Switching between
full load operation and unload operation)
(only P500 YMF-C).

Capacity control and controlling the rise
of high-pressure (Back-up of frequency
control).

R

120 

= 7.465 k

Ω

B

25/120 

= 4057

Rt =
7.465exp
{4057(           -              )}

20

°

C: 250 k

Ω

70

°

C:

34 k

Ω

30

°

C: 160 k

Ω

80

°

C:

24 k

Ω

40

°

C: 104 k

Ω

90

°

C: 17.5 k

Ω

50

°

C: 70 k

Ω

100

°

C: 13.0 k

Ω

60

°

C: 48 k

Ω

110

°

C: 9.8 k

Ω

R

50

 = 17 k

Ω

B

25/120 

= 4170

Rt =
  17exp {4170 (        -        )}

0

°

C: 181 k

Ω

10

°

C: 105 k

Ω

20

°

C: 64 k

Ω

25

°

C: 50 k

Ω

30

°

C: 40 k

Ω

40

°

C: 26 k

Ω

AC 220 to 240 V
Open : conducting
Close: not conducting

AC 220 to 240 V
Close: conducting
Open : not conducting

AC 220 to 240 V
Open : conducting
Close: not conducting

THHS inverter
heat sink tem-
perature

SV1
discharge-
suction
bypass

SV22
capacity
control (full
load)

SV32
capacity
control
(unload)

SV4a
discharge-
suction
bypass

TH9

Controls defrosfing during heating

1) Detects the CS circuit fluid tempera-

ture.

2) Calculates the refrigerant circulation

configuration.

R

0 

= 15 k

Ω

B

1/80 

= 3460

Rt =
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

Solenoid
valve