Mitsubishi Electric Mr.Slim MUZ-GC25NA - C1 User manual

SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS····················· 3
2. SPECIFICATION················································ 4
3. OUTLINES AND DIMENSIONS ························ 8
4. WIRING DIAGRAM············································ 9
5. REFRIGERANT SYSTEM DIAGRAM ············· 14
6. PERFORMANCE CURVES ····························· 18
7. ACTUATOR CONTROL··································· 23
8. SERVICE FUNCTIONS ··································· 24
9. TROUBLESHOOTING····································· 24
10. DISASSEMBLY INSTRUCTIONS···················· 54
Models
SPLIT-TYPE AIR CONDITIONERS
MUZ-GC25NA - C1
MUZ-GC35NA - C1
MUZ-GC35NA - C2
MUZ-GC50NA - C1
MUZ-GC50NA - C2
MUZ-GC60NA - C1
MUZ-GC60NA - C2
MUZ-GC71NA - C1
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH482
REVISED EDITION-C
OUTDOOR UNIT
Indoor unit service manual
MSZ-GC•NA Series (OBH481)
MUZ-GC25/35NA PARTS CATALOG (OBB482)
Please void OBH482 REVISED EDITION-B.
Revision C:
• MUZ-GC35NA - C2 has been added.

2
Revision A:
• MUZ-GC60NA - C2 has been added.
MUZ-GC60NA - C1 →MUZ-GC60NA - C2
1. Compressor has been changed. (SNB130FLDH1 →SNB130FGBH)
2. Outdoor electronic control P.C. board has been changed.
3. Refrigerant circuit has been changed.
MUZ-GC50NA - C1 →MUZ-GC50NA - C2
1. Compressor has been changed. (SNB130FLDH1 →SNB130FGBH)
2. Outdoor electrical parts have been changed.
3. Refrigerant circuit has been changed.
MUZ-GC35NA - C1 →MUZ-GC35NA - C2
1. Outdoor electrical parts have been changed.
2. Compressor has been changed. (KNB073FGDH →KNB073FGDHC)
Revision B:
• MUZ-GC50NA - C2 has been added.
Revision C:
• MUZ-GC35NA - C2 has been added.

3
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
MUZ-GC25NA MUZ-GC35NA
Piping
Air outlet
Air inlet
(back and side)
Drain hose
Drain outlet
MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA
1PART NAMES AND FUNCTIONS

4
Outdoor model MUZ-GC25NA MUZ-GC35NA
Function Cooling Heating Cooling Heating
Power supply Single phase 220 - 230 V, 60 Hz
Capacity
Rated frequency (Min.-Max.) kW 2.5 (0.9-3.0) 3.2 (0.9-4.5) 3.2 (1.0-3.7) 3.6 (0.9-4.8)
Electrical data
Power outlet A 10
Running current (Total) A 3.88 4.44 5.26 5.14
Power input (Total) W 735 860 1,065 1,040
Power factor (Total) % 86 88 92 92
Starting current 1 (Total) A 4.44 5.26
Coefficient of performance (C.O.P) 1
(Total) 3.40 3.72 3.00 3.46
Compressor
Model KNB065FDTHC C1 KNB073FGDH
C2 KNB073FGDHC
Output W 500 550
Current 1 A 3.35 3.91 4.73 4.61
Fan motor Model RA6V21-BD
Current A 0.29
Dimensions W×H×D mm 684 × 540 × 255
Weight kg 26
Special remarks
Dehumidification /h 1.4 — 2 —
Air flow (High/Low) m3/h 1,860
Sound level dB 47 48 48 49
Fan speed rpm 830
Fan speed regulator 1
Refrigerant filling capacity
(R410A) kg 0.75
Refrigeration oil (Model) NEO22
NOTE : Test conditions are based on CNS 14464, 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
1 Measured under rated operating frequency.
2SPECIFICATION

5
Outdoor model MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA
Function Cooling Heating Cooling Heating Cooling Heating
Power supply Single phase 220 - 230 V, 60 Hz
Capacity Rated frequency
(Min.-Max.) kW 5.0 (1.2-5.8) 5.6 (1.2-7.8) 6.0 (1.2-6.7) 6.8 (1.2-8.1) 7.1 (1.4-8.3) 8.1 (1.4-9.6)
Electrical data
Power outlet A 20
Running current 1 (Total) A C1 8.26 8.22 C1 10.33 9.72 12.03 11.96
C2 8.08 C2 10.05
Power input 1 (Total) W C1 1,800 1,790 C1 2,160 2,010 2,540 2,500
C2 1,760 C2 2,100
Power factor 1 (Total) % 99 99 95 94 96 95
Starting current 1 (Total) A C1 8.26 C1 10.33 12.03
C2 8.22 C2 10.05
Coefficient of performance (C.O.P) 1
(Total)
C1 2.78 3.13 C1 2.78 3.38 2.80 3.24
C2 2.84 C2 2.86
Compressor
Model C1 SNB130FLDH1 C1 SNB130FLDH1 TNB220FMCHT
C2 SNB130FGBH C2 SNB130FGBH
Output W 850 1,300
Current 1 A 7.59 7.55 9.41 8.80 11.11 11.04
Fan motor Model RC0J60-AA
Current 1 A 0.32
Dimensions W×H×D mm 840 × 850 × 330
Weight kg 53 58
Special remarks
Dehumidification /h 1.7 — 1.6 — 2.5 —
Air flow 1 m3/h 2,940/1,650 2,940/2,210 2,940/1,650 2,940/2,210 2,940/1,650 2,940/2,210
Sound level 1 (High/Low) dB (A) 52/51 55/53 53/51 55/53 53/51 55/53
Fan speed (High/Low) rpm 800/480 800/620 800/480 800/620 800/480 800/620
Fan speed regulator 2
Refrigerant filling capacity
(R410A) kg 1.5 1.8 2
Refrigeration oil (Model) NEO22
NOTE : Test conditions are based on CNS 14464, 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
1 Measured under rated operating frequency.

6
Specifications and rating conditions of main electric parts
Model
Item MUZ-GC25NA MUZ-GC35NA
Current transformer (CT) 20 A
Smoothing capacitor (C61, C62) 500 μF 420 V
Diode module (DB61) 15 A 600 V
(DB65) 10 A 600 V
Fuse (F61) 250 V 20 A
(F701, F801) 250 V 3.15 A
Intelligent power module (IPM) 10 A 600 V
Expansion valve coil (LEV) DC 12 V
Reactor (L61) 18 mH 7 A
Current-detecting resistor (R61) 45 mΩ5 W
(R825) 25 mΩ5 W
Current-limiting PTC thermistor (PTC64) 33 Ω
Terminal block (TB1,TB2) 3 P
Relay (X61) 5 A 250 V
(X63) 3 A 250 V
(X64) 20 A 250 V
R.V. coil (21S4) AC 220 - 240 V
Outdoor fan motor thermal fuse Open 126°C (RA6V21-BD)
IGBT (TR821) 30 A 600 V
Model
Item MUZ-GC50NA - C1 MUZ-GC60NA MUZ-GC71NA
Current transformer (CT1,2) ETQ19Z68AY
(CT61) ETQ19Z53AY
Smoothing capacitor (CB1,2,3) 560 μF 450 V
Fuse (F64) 250 V 2 A
(F801) 250 V 3.15 A
(F911) 250 V 1 A
Expansion valve coil (LEV) DC 12 V
Intelligent power module (IPM) PS21244-A
(HC930) PS21661-RZ
High pressure switch (HPS) – ACB-DB156 (for C2 )ACB-DB156
Reactor (L) 340 μH 20 A
Power factor controller (PFC) PS51259-A
Resistor (R64A,B) 10 Ω10 W
(R937A,B) 1.1 Ω2 W 2%
(RS1 - 4) 0.04 Ω7 W
Solenoid coil relay (SSR61) TLP3506
Terminal block (TB1) 3 P
(TB2) 3 P
Relay (X64) G4A
R.V. coil (21S4) AC 220 - 240 V

7
Model
Item MUZ-GC50NA- C2
Current transformer (CT) 20 A
(CT761, CT781) 15 A
Smoothing capacitor (C61, C62, C63) 620 F 420 V
Diode module (DB61) 25 A 600 V
(DB65) 25 A 600 V
Fuse (F61) T20AL250V
(F701, F801, F901) T3.15AL250V
Intelligent power module (IPM) 20 A 600 V
Expansion valve coil (LEV) DC 12 V
Reactor (L61) 23.0 mH
Current-detecting resistor
(R61, R62) 180 m5 W (2 elements)
(R825) 25 m5 W
(R937A, R937B) 1.1 2 W
Current-limiting PTC thermistor (PTC64, PTC65) 33 
Terminal block (TB1, TB2) 3 P
Relay (X63) 3 A 250 V
(X64) 20 A 250 V
R.V. coil (21S4) AC 220 - 240 V
IGBT (TR821) 30 A 600 V

8
MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA
30°
35°
155
90
198
40
515
299
66
34
51
330
360
850
430
500169 80
121
840
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
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) ø12.7 (MUZ-GC50)
ø15.88 (MUZ-GC60/71)
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) ø6.35 (MUZ-GC50/60)
ø9.52 (MUZ-GC71)
REQUIRED SPACE
Drain holes ø33
20.8
144.6 89.6
255
145.5
Service panel
Service port
Air out
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø9.52
43°
40°
REQUIRED SPACE Basically open 100 mm or more
without any obstruction in front
and on both sides of the unit.
350 mm or more
100 mm or more
100 mm or more
100 mm or more
Open two sides of left,
right, or rear side.
Drain hole ø33
Air in
Air in
381.5
Bolt pitch for
installation
264~280
300
540
270
10
47.5
22.5
17.5
243
Bolt pitch for installation
500
684
61
105
Handle
2 holes 10×16
40
Unit : mm
MUZ-GC25NA MUZ-GC35NA
3OUTLINES AND DIMENSIONS

9
MUZ-GC25NA MUZ-GC35NA
4WIRING DIAGRAM

10
MUZ-GC50NA-C1 MUZ-GC60NA-C1

11
MUZ-GC50NA-C2

12
MUZ-GC60NA-C2

13
MUZ-GC71NA

14
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Capillary tube
ø 3.0× ø 2.0×260
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)
LEV R.V. coil
heating ON
cooling OFF
Strainer
#100
Muffler
Muffler
MUZ-GC25NA MUZ-GC35NA
MUZ-GC50NA-C1
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø3.6ø×2.4×50
Capillary tube
ø1.8ø×0.6×1000
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø12.7
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Oil separator
Strainer
#100
Receiver
Outdoor
heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Strainer
#100 Ambient
temperature
thermistor
RT65
Unit : mm
Unit : mm
5REFRIGERANT SYSTEM DIAGRAM

15
MUZ-GC60NA-C1
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø3.6ø×2.4×50 Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø 6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
MUZ-GC50NA - C2
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with s trainer )
Stop valve
(with service port)
Capillary tube
ø3.6ø×2.4×50
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø12.7
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
LEV R.V. coil
OFF
ON
Muffler
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Unit : mm
Unit : mm

16
MUZ-GC71NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø3.6ø×2.4×50
Capillary tube
ø1.8ø×0.6×1000
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø9.52
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Oil separator High-pressure
switch
Strainer
#100
Receiver
Outdoor
heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Strainer
#100 Ambient
temperature
thermistor
RT65
MUZ-GC60NA-C2 Unit : mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø3.6ø×2.4×50 Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
High-pressure
switch
Unit : mm

17
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Refrigerant piping : m Piping size O.D : mm
Max. Length
A
Max. Height difference
B Gas Liquid
MUZ-GC25NA
MUZ-GC35NA 20 12 9.52
6.35
MUZ-GC50NA
30 15
12.7
MUZ-GC60NA 15.88
MUZ-GC71NA 9.52
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-GC25NA
MUZ-GC35NA 750 0 0 0 90 120 150 180 210 240 270 300 450
Calculation : X g = 30 g/m × (Refrigerant piping length (m) – 5)
Model Outdoor unit
precharged
Refrigerant piping length (one way)
7 m 10 m 15 m 20 m 25 m 30 m
MUZ-GC50NA 1,500 0 60 160 260 360 460
MUZ-GC60NA 1,800
Calculation : X g = 20 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-GC71NA 2,000 0 165 440 715 990 1,265
Calculation : X g = 55 g/m × (Refrigerant piping length (m) – 7)
NOTE : Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.

18
MUZ-GC25NA MUZ-GC35NA MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA
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 ~ 253V, 60Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °C [WB]
(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]
(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.
}
}
Cooling
Heating
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.
INDOOR UNIT OUTDOOR UNIT
Wet and dry-bulb
thermometers Wet and dry-bulb
thermometers
8.7
8.0
7.3
6.6
5.9
5.3
MUZ-GC60NA
Indoor air Wet-bulb temperature
difference (°C)
MUZ-GC50NA
8.7
8.0
7.3
6.6
5.9
5.3
MUZ-GC35NA
9.0
8.3
7.5
6.8
6.1
5.4
MUZ-GC25NA
7.5
6.8
6.3
5.7
5.1
4.5
MUZ-GC71NA
Outdoor intake air Dry-bulb temperature (°C) Outdoor intake air Dry-bulb temperature (°C)
10.7
9.8
8.9
8.0
7.2
6.4
Indoor intake air Wet-bulb temperature (
°C
)
Indoor intake air Wet-bulb temperature (°C)
Cooling capacity ( at Rated frequency )Total inpup (Cooling :
at Rated frequency )
6-1. CAPACITY AND INPUT CURVES
6PERFORMANCE CURVES

19
20.9
19.3
17.7
16.1
14.5
12.9
11.3
9.7
22.4
20.7
19.0
17.2
15.5
13.8
12.1
10.3
Indoor air Dry-bulb temperature
difference (°C)
Indoor intake air Dry-bulb temperature (°C)
Outdoor intake air Wet-bulb temperature (°C) Outdoor intake air Wet-bulb temperature (°C)
Indoor intake air Dry-bulb temperature (°C)
MUZ-GC35NA
MUZ-GC25NA
24.1
22.3
20.4
18.5
16.7
14.8
13.0
11.1
23.4
21.6
19.8
18.0
16.2
14.4
12.6
10.8
MUZ-GC60NA
MUZ-GC50NA
27.9
25.7
23.6
21.4
19.3
17.2
15.0
12.9
MUZ-GC71NA
Heating capacity ( at Rated frequency )Total inpup (Heating :
at Rated frequency )
NOTE : The above broken lines are for the heating operation without any front and
defrost operation.
6-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
The operational frequency of compressor
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
The operational frequency of compressor
MUZ-GC25NA
MUZ-GC35NA
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
MUZ-GC50NA
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling total input
Input correction factors
The operational frequency of compressor
Correction of Heating total input
Input correction factors
The operational frequency of compressor
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
Correction of Cooling total input
Input correction factors
Correction of Cooling capacity
Capacity correction factors
Correction of Heating total input
Correction of Heating capacity
Capacity correction factors
Input correction factors
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0

20
MUZ-GC71NA
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz)
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
MUZ-GC60NA
0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz) 0 50 100 150
0.5
1.0
1.5
(Hz)
6-3. TEST RUN OPERATION (How to operate fixed-frequency operation)
1. Press EMERGENCY OPERATION switch to 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
varies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.