Mitsubishi Electric CITY MULTI CMB-P1016V-F, Service Handbook

Page: 70 / 183

Name Application Specification Check method Object
Outdoor unit
Symbol
(function)
Thermistor
Solenoid
valve
Linear
expansion
valve
Linear
expansion
valve
Thermistor
THHS
SV1
(discharge -
suction
bypass)
SV3 ~ 4
SV3 ~ 6
LEV1
(SC coil)
LEV
TH21
(inlet air
temperature)
TH22
(piping
temperature)
TH23
(gas side
piping
temperature)
1) Detects the inverter cooling fin
temperature.
2) Provides inverter overheating
protection.
3) Controls the control box cooling
fan.
1) High/low press. bypass at starting/
stopping and capacity control at
low load
2)
3)
Discharge press. rise suppression
Capacity control and high press . rise
suppression (backup for frequency
control)
Control of heat exchanger capacity.
Adjustment bypass flow rate from
outdoor unit liquid line at cooling.
1) Adjust superheat of outdoor unit
heat exchanger outlet at cooling.
2) Adjust subcool of indoor unit heat
exchanger at heating.
Indoor unit control (thermostat)
21S4a 4-way valve Changes for cooling and heating
CH1 Crank case
heater Heating of compressor refrigerant
1) Indoor unit control (freeze
prevention, hot adjust, etc.)
2) LEV control in heating operation
(Subcool detection)
LEV control in cooling operation
(Superheat detector)
R
50
=17k
Ω
B
25/50
=4170
Rt =
17exp{4170( - )}
-20˚C : 605.0k
Ω
50˚C : 17.0k
Ω
-10˚C : 323.3k
Ω
60˚C : 11.5k
Ω
0˚C : 180.9k
Ω
70˚C : 8.0k
Ω
10˚C : 105.4k
Ω
80˚C : 5.7k
Ω
20˚C : 63.8k
Ω
90˚C : 4.1k
Ω
30˚C : 39.9k
Ω
100˚C : 3.0k
Ω
40˚C : 25.7k
Ω
AC 220~240V
Open at energizing and
close at deenergizing
0~480 pulses
DC12V
Cord heater AC 220~240V
MC......1280
Ω
.......45W
Opening of stepping motor
driving valve
0~2,000 pulses
R
AC220~240V
on cooling
off heating
0
= 15k
Ω
B
0/100
= 3460
Rt =
15exp {3460 ( - )}
0
°
C : 15k
Ω
10
°
C : 9.7k
Ω
20
°
C : 6.4k
Ω
25
°
C : 5.3k
Ω
30
°
C : 4.3k
Ω
40
°
C : 3.1k
Ω
• Continuity check
by tester
• Temperature of
inlet and outlet.
Continuity check
with tester for
white-red-orange
yellow-brown-blue
Resistance value
Continuity check
with tester
check
• PU(H)Y-
(P)200·250·315
• PURY-
P200·250
• PURY-
P200·250
• PU(H)Y-
(P)200·250
Indoor unit
1
273+50
1
273+t
1
273+t
1
273+0
Control of heat exchanger capacity.
• PU(H)Y-
P200·250·315
PURY-
P200·250
•
•
•
•
PU(H)Y-
(P)200·250·315
PURY-
P200·250
PU(H)Y-
(P)200·250·315
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