Mitsubishi MUZ-GE25VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES······························ 7
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM············· 15
8. PERFORMANCE CURVES····························· 17
9. ACTUATOR CONTROL··································· 31
10. SERVICE FUNCTIONS···································· 32
11. TROUBLESHOOTING····································· 32
12. DISASSEMBLY INSTRUCTIONS···················· 50
Models
SPLIT-TYPE AIR CONDITIONERS
MUZ-GE25VA - E1
MUZ-GE25VAH - E1
MUZ-GE35VA - E1
MUZ-GE35VAH - E1
MUZ-GE42VA - E1
MUZ-GE42VAH - E1
MUZ-GE50VA - E1
MUZ-GE50VAH - E1
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH516
REVISED EDITION-A
OUTDOOR UNIT
Indoor unit service manual
MSZ-GE•VA Series (OBH515)
MSZ-CGE•VA Series (OBH523)
PARTS CATALOG (OBB516)
MUZ-GE25/35/42VA
Revision A:
• MUZ-GE42/50VA(H) - E1 has been added.
Please void OBH516.

2
Revision A:
• MUZ-GE42/50VA(H) - E1 has been added.

3
MUZ-GE25VA - E1 MUZ-GE25VAH - E1
MUZ-GE35VA - E1 MUZ-GE35VAH - E1
MUZ-GE42VA - E1 MUZ-GE42VAH - E1
MUZ-GE50VA - E1 MUZ-GE50VAH - E1
1. New model
TECHNICAL CHANGES
1

4
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH
MUZ-GE42VA MUZ-GE42VAH
MUZ-GE50VA MUZ-GE50VAH
Piping
Air outlet
Air inlet
(back and side)
Drain hose
Drain outlet
(GE50VA)
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MUZ-GE25/35/42VA MUZ-GE50VA
Drain socket 1 1
Drain cap - 2

5
Outdoor model MUZ-GE25VA
MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.)
Cooling kW 2.5 (1.1 - 3.5) 3.5 (1.1 - 4.0) 4.2 (0.9 - 4.8) 5.0 (1.4 - 5.5)
Heating 3.2 (1.3 - 4.5) 4.0 (1.6 - 5.3) 5.4 (1.4 - 6.0) 5.8 (1.4 - 7.3)
Breaker Capacity A 10 16
Electrical data
Power input 1 (Total) Cooling W545 865 1,215 1,515
Heating 700 955 1,460 1,565
Running current 1
(Total)
Cooling A2.9 4.2 5.6 6.8
Heating 3.7 4.6 6.6 7.0
Power factor 1 (Total) Cooling %82 90 94 96
Heating 82 90 96 97
Starting current 1 (Total) A 3.7 4.6 6.6 7.0
Coefficient of performance
(COP) 1 (Total)
Cooling 4.59 4.05 3.46 3.30
Heating 4.57 4.19 3.70 3.71
Compressor
Model KNB073FFDHC KNB092FFAHC SNB130FGBHT
Output W 550 650 900
Current 1 Cooling A2.44 3.56 4.99 6.09
Heating 3.20 4.06 5.98 6.32
Refrigeration oil (Model) cc 320 (NEO22) 450 (NEO22)
Fan motor
Model RC0J50-DB RC0J50-EA RC0J60-AA
Current 1Cooling A0.24 0.35 0.32 0.32
Heating 0.27 0.31 0.31
Dimensions W × H × D mm 800 × 550 × 285 840 × 850 × 330
Weight kg 30 33 36 54
Special remarks
Dehumidification Cooling /h 0.2 0.9 1.4 1.8
Air flow 1
Cooling Med.
m3/h
1,806 1,872 1,872 2,940
Low 1,170 1,776 1,086 1,740
Heating
High 2,106 2,016 2,016 –
Med. 1,806 1,776 1,776 2,940
Low 1,452 1,386 1,386 2,142
Sound level 1 Cooling dB(A) 47 50 54
Heating 48 51 56
Fan speed
Cooling Med.
rpm
740 810 810 780
Low 490 770 490 480
Heating
High 860 870 870 –
Med. 740 770 770 780
Low 600 610 610 580
Fan speed regulator 3 2
Refrigerant filling capacity (R410A) kg 0.80 1.15 1.55
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C
Heating: Indoor Dry-bulb temperature 20°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Refrigerant piping length (one way): 5 m
1 Measured under rated operating frequency.
SPECIFICATION
3

6
Specifications and rating conditions of main electric parts
Model
Item MUZ- GE25VA MUZ- GE25VAH MUZ- GE35VA MUZ- GE35VAH MUZ- GE42VA MUZ- GE42VAH MUZ- GE50VA MUZ- GE50VAH
Current
transformer
(CT) 20 A
(CT761, CT781) 15 A
Smoothing
capacitor (C61, C62, C63) 620 μF 420 V
Diode module (DB61) 15 A 600 V 25 A 600 V
(DB65) 25 A 600 V
Fuse
(F61) T20AL250V
(F701, F801,
F901) T3.15AL250V
Defrost heater (H) — 230 V
130 W —230 V 130 W —230 V 130 W —230 V 120 W
Intelligent power
module (IPM) 15 A 600 V 20 A 600 V
Expansion valve
coil (LEV) DC 12 V
Reactor (L61) 18 mH 23 mH
Current-
detecting
resistor
(R61) 45 mΩ5 W
(1 element)
100 mΩ5 W
(2 elements) —
(R61,R62) — 180 mΩ5 W
(2 elements)
(R825) 25 mΩ5 W
(R937, R938,
R939) 430 mΩ2 W —
(R937A,R937B) — 1.1 Ω2 W
Current-limiting
PTC thermistor
(PTC64,
PTC65) 33 Ω
Terminal block (TB1, TB2) 3 P
Relay
(X63) 3 A 250 V
(X64) 20 A 250 V
(X66) — 3 A 250 V — 3 A 250 V — 3 A 250 V — 3 A 250 V
R.V.coil (21S4) AC 220 - 240 V
Heater protector (26H) — Open 45°C — Open 45°C — Open 45°C — Open 45°C
IGBT (TR821) 30 A 600 V

7
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
47
48
NC-10
MUZ-GE25VA MUZ-GE25VAH
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
47
48
NC-10
MUZ-GE35VA MUZ-GE35VAH
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
50
NC-10
51
MUZ-GE42VA MUZ-GE42VAH
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
54
NC-10
56
MUZ-GE50VA MUZ-GE50VAH
NOISE CRITERIA CURVES
4
Test conditions
Cooling : Dry-bulb temperature 35 °C
Heating : Dry-bulb temperature 7 °C Wet-bulb temperature 6 °C
OUTDOOR UNIT
MICROPHONE
1 m

8
Unit: mm
MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH
MUZ-GE42VA MUZ-GE42VAH
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23 Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304~325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø9.52
43
35
2 holes 10 X 21
REQUIRED SPACE Basically open 100 mm or more
without any obstruction in front
and on both sides of the unit.
350 mm or more
200 mm or more
100 mm or more
100 mm or more
Open two sides of left,
right, or rear side.
Drain hole ø42 (25/35/42VA)
Drain hole ø33 (25/35/42VAH)
MUZ-GE50VA MUZ-GE50VAH
OUTLINES AND DIMENSIONS
5
30°
35°
155
90
198
40
515
299
66
34
51
330
360
850
430
500 80
121
840
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) ø12.7
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) ø6.35
170
Open as a rule
500 mm or more if
the front and both
sides are open
100 mm or more
200 mm or more if
there are obstacles
to both sides
Open as a rule
500 mm or more if the back,
both sides and top are open
350 mm or more
100 mm or more
REQUIRED SPACE
Air in
Air out
Air in
4 holes 10 × 21
Drain holes ø33(50VA)

9
MUZ-GE25VA MUZ-GE35VA
WIRING DIAGRAM
6

10
MUZ-GE25VAH MUZ-GE35VAH

11
MUZ-GE42VA

12
MUZ-GE42VAH

13
MUZ-GE50VA

14
MUZ-GE50VAH

15
Unit: mm
MUZ-GE25VA MUZ-GE25VAH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
ø3.0×ø2.0×240
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
REFRIGERANT SYSTEM DIAGRAM
7
Unit: mm
MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
ø3.0×ø1.8×600(×2)
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
ø3.0×ø2.0×240
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler

16
MUZ-GE50VA MUZ-GE50VAH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Capillary tube
ø 3.6 × ø 2.4 × 50 Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 12.7
(with heat insulator)
Refrigerant pipe ø 6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Muffler
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Unit: mm
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Model Outdoor unit
precharged
Refrigerant piping length (one way)
5 m 6 m 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m
MUZ-GE25 800
0 0 0 30 60 90 120 150 180 210 240 390
MUZ-GE35/42 1,150
Calculation: X g = 30 g/m × (Refrigerant piping length (m) - 7)
Model Outdoor unit
precharged
Refrigerant piping length (one way)
7 m 10 m 15 m 20 m 25 m 30 m
MUZ-GE50 1,550 0 60 160 260 360 460
Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 7)
NOTE: Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Refrigerant piping: m Piping size O.D: mm
Max. Length
A
Max. Height difference
BGas Liquid
MUZ-GE25/35/42 20 12 9.52 6.35
MUZ-GE50 30 15 12.7

17
The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-
tions vary according to the areas where these units are installed, the following information has been provided to clarify the
operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198 ~ 264 V, 50 Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature: °C [WB]
}
Cooling
(2) Indoor outlet air wet-bulb temperature: °C [WB]
(3) Outdoor intake air dry-bulb temperature: °C [DB]
(4) Total input: W
(5) Indoor intake air dry-bulb temperature: °C [DB]
}
Heating(6) Outdoor intake air wet-bulb temperature: °C [WB]
(7) Total input: W
Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the
indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.
How to measure the indoor air wet-bulb / dry-bulb temperature difference
1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.
2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake.
Cover the thermometers to prevent direct rays of the sun.
3. Check that the air filter is cleaned.
4. Open windows and doors of room.
5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH
MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH
INDOOR UNIT OUTDOOR UNIT
Wet and dry-bulb
thermometers
FRONT VIEW
Wet and dry-bulb
thermometers
BACK VIEW
Cooling capacity ( at Rated frequency)
0.9
1.0
1.1
1.2
1.3
1.4
1.5
-10-5 0 5 1015202530354045
Outdoor intake air Dry-bulb temperature(°C)
Capacity correction factors
26
24
20
18
22
Indoor intake air Wet-bulb
temperature( )
10.4
9.5
8.7
8.0
7.2
6.5
5.7
MUZ-GE50VA MUZ-GE50VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE35VA MUZ-GE35VAH
MUZ-GE25VA MUZ-GE25VAH
Indoor air Wet-bulb temperature
difference (°C)
6.6
6.1
5.6
5.1
4.6
4.2
3.7
8.4
7.7
7.1
6.5
5.9
5.3
4.7
10.2
9.4
8.6
7.9
7.1
6.4
5.7
8-1. CAPACITY AND INPUT CURVES
PERFORMANCE CURVES8

18
NOTE: The above broken lines are for the heating operation without any frost and defrost operation.
0.8
0.9
1.0
1.1
1.2
1.3
-10-5 0 5 1015202530354045
Outdoor intake air Dry-bulb temperature (°C)
Input correction factors
26 24 22
20
18
Indoor intake air Wet-bulb
temperature( )
Indoor air Wet-bulb temperature
difference (°C)
5.6
5.1
4.6
4.2
3.7
3.3
7.1
6.5
5.9
5.3
4.7
4.1
8.7
8.0
7.2
6.5
5.7
5.0
8.6
7.9
7.1
6.4
5.7
5.0
MUZ-GE50VA MUZ-GE50VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE25VA MUZ-GE25VAH
Total input (Cooling : at Rated frequency )
Indoor air Dry-bulb temperature
difference (°C)
18.2
16.8
15.4
14.0
12.6
11.2
9.8
8.4
7.0
5.6
22.7
21.0
19.2
17.5
15.7
14.0
12.2
10.5
8.7
7.0
27.0
24.9
22.8
20.7
18.7
16.6
14.5
12.4
10.4
8.3
26.2
24.1
22.1
20.1
18.1
16.1
14.1
12.1
10.1
8.0
MUZ-GE50VA MUZ-GE50VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE25VA MUZ-GE25VAH
Outdoor intake air Wet-bulb temperature (°C)
-20 -15 -10 -5 0 5 10 15
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3 Heating capacity (
at Rated frequency)
Capacity correction factor
15
20
26
Indoor intake air Dry-bulb temperature ( )
Indoor air Dry-bulb temperature
difference (°C)
18.2
16.8
15.4
14.0
12.6
11.2
9.8
8.4
7.0
5.6
22.7
21.0
19.2
17.5
15.7
14.0
12.2
10.5
8.7
7.0
MUZ-GE50VA MUZ-GE50VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE25VA MUZ-GE25VAH
27.0
24.9
22.8
20.7
18.7
16.6
14.5
12.4
10.4
8.3
26.2
24.1
22.1
20.1
18.1
16.1
14.1
12.1
10.1
8.0
Outdoor intake air Wet-bulb temperature (°C)
-20 -15 -10 -5 0 5 10 15
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3 Total input (Heating:
at Rated frequency )
Input correction factor
15
20
26
Indoor intake air Dry-bulb temperature ( )

19
MUZ-GE25VA MUZ-GE25VAH
MUZ-GE35VA MUZ-GE35VAH
Correction of Cooling capacity
Capacity correction factors
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-GE42VA MUZ-GE42VAH Correction of Heating input
Capacity correction factors
Correction of Cooling capacity
Capacity correction factors
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-GE50VA MUZ-GE50VAH Correction of Heating input
Capacity correction factors
0.0
0.5
1.0
1.5
0 50 100
The operational frequency
of compressor (Hz)
The operational frequency
of com
p
ressor
(
Hz
)
The operational frequency
of com
p
ressor
(
Hz
)
The operational frequency
of com
p
ressor
(
Hz
)
The operational frequency
of com
p
ressor
(
Hz
)
The operational frequency
of compressor (Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 The operational frequency
of compressor (Hz) The operational frequency of compressor (Hz)
0.0
0.5
1.0
1.5
050100
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
0 50 100 0.0
0.5
1.0
1.5
0 50 100 0.0
0.5
1.0
1.5
0 50 100 0.0
0.5
1.0
1.5
2.0
050100
Correction of Cooling capacity
0.0
0.5
1.0
1.5
0 50 100
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Cooling input
0.0
1.0
2.0
3.0
050100
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Heating capacity
0.0
0.5
1.0
1.5
0 50 100 150
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Heating input
0.0
0.5
1.0
1.5
2.0
0 50 100 150
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Cooling capacity
0.0
0.5
1.0
1.5
0 50 100
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Cooling input
0.0
0.5
1.0
1.5
2.0
050100
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Heating capacity
0.0
0.5
1.0
1.5
050100
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Heating input
0.0
0.5
1.0
1.5
2.0
0 50 100
The operational frequency
of compressor (Hz)
Input correction factors
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR

20
Outdoor low pressure
MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH
MUZ-GE50VA MUZ-GE50VAH
15 20 25 30 35
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
MPa [Gauge]
kgf/cm2[Gauge]
MPa [Gauge]
kgf/cm2[Gauge]
15 20 25 30 35
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
MPa [Gauge]
kgf/cm2[Gauge]
0.5
0.6
0.7
0.8
0.9
6
7
8
9
0.4
0.5
0.6
0.7
5
6
7
0.3
0.4
0.5
0.6
0.7
4
5
6
7
15 20 25 30 35
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
MPa [Gauge]
kgf/cm2[Gauge]
0.3
0.4
0.5
0.6
0.7
4
5
6
7
15 20 25 30 35
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
COOL operation
Both indoor and outdoor unit are under the same temperature/
humidity condition.
Operation: TEST RUN OPERATION (Refer to 8-3.)
8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
Dry-bulb temperature (°C) Relative humidity (%)
20 50
25 60
30 70
8-3. TEST RUN OPERATION (How to operate fixed-frequency operation)
1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice).
2. Test run operation starts and continues to operate for 30 minutes.
3. Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode.
4. Indoor fan operates at High speed.
5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (operation frequency of compressor var-
ies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.
NOTE:
The unit of pressure has been changed to MPa on the international system of units (SI unit system)
The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm2[Gauge])