Mitsubishi Electric MUZ-DM25VA-E1 User manual

Models
MUZ-DM25VA -E1 , ER1 , ET1
MUZ-DM35VA -E1 , ER1 , ET1
OUTDOOR UNIT
SERVICE MANUAL No. OBH751
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES··························6
5. OUTLINES AND DIMENSIONS·····················7
6. WIRING DIAGRAM·····································8
7. REFRIGERANT SYSTEM DIAGRAM·············9
8. PERFORMANCE CURVES ························10
9. ACTUATOR CONTROL·····························20
10. SERVICE FUNCTIONS······························21
11. TROUBLESHOOTING·······························22
12. DISASSEMBLY INSTRUCTIONS·················40
HFC
utilized
R410A
Indoor unit service manual
MSZ-DM•VA Series (OBH750)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB751)

2
MUZ-DM25VA - E1 , ER1 , ET1
MUZ-DM35VA - E1 , ER1 , ET1
1. New model
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
Use the specified refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
TECHNICAL CHANGES
1
OBH751

3
2PART NAMES AND FUNCTIONS
ACCESSORIES
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(Back and side)
MUZ-DM25VA MUZ-DM35VA
Drain socket 1
OBH751

4
3SPECIFICATION
Outdoor model MUZ-DM25VA MUZ-DM35VA
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.)
Cooling kW 2.5 (1.3 - 3.0) 3.15 (1.4 - 3.5)
Heating 3.15 (0.9 - 3.5) 3.6 (1.1 - 4.1)
Breaker Capacity A 10
Electrical data
Power input 1 (Set) Cooling W710 1,020
Heating 850 975
Running current 1 (Set) Cooling A3.6 4.8
Heating 4.1 4.7
Power factor 1 (Set) Cooling %85 92
Heating 90
Starting current 1 (Set) A 4.1 4.8
Coefficient of performance
(COP) 1 (Set)
Cooling 3.52 3.09
Heating 3.71 3.69
Compressor
Model KNB065FUBMC KNB073FUXMC
Output W 500 550
Current 1Cooling A3.3 4.4
Heating 3.8 4.4
Refrigeration oil (Model) L 0.27 (FV50S)
Fan motor Model RC0J20-AA
Current 1 A 0.26
Dimensions W × H × D mm 699 × 538 × 249
Weight kg 24 25
Special remarks
Dehumidification Cooling L/h 0.4 0.6
Air flow 1 m3/h 1,890
Sound level 1 Cooling dB(A) 50 51
Heating 50 51
Fan speed rpm 840
Fan speed regulator 1
Refrigerant filling capacity (R410A) kg 0.70 0.72
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.
OBH751

5
Specifications and rated conditions of main electric parts
Model
Item MUZ-DM25VA MUZ-DM35VA
Smoothing capacitor (C62) 800 μF 420 V
Diode module (DB61) 15 A 600 V
(DB65) 25 A 600 V
Fuse (F701, F801, F901) T3.15AL250V
Power module (IC700) 10 A 600 V
Expansion valve coil (LEV) 12 VDC
Reactor (L61) 18 mH
Switching power transistor (Q821) 30 A 600 V
Circuit protection (PTC65) 33 Ω
Terminal block (TB) 3 P
Relay (X63) 3 A 250 V
(X64) 20 A 250 V
R.V. coil (21S4) 220 - 240 VAC
OBH751

6
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
50
50
NC-10
MUZ-DM25VA
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
51
51
Test conditions
Cooling : Dry-bulb temperature 35°C
Heating : Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
MICROPHONE
1m
NC-10
MUZ-DM35VA
4NOISE CRITERIA CURVES
OBH751

7
Unit : mm
MUZ-DM25VA MUZ-DM35VA
5OUTLINES AND DIMENSIONS
REQUIRED SPACE
100 mm or more
350 mm or more
100 mm or more
*1 100 mm or more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
200 mm or
more *2
41.5
270.3
157.7
43°
40°
102.7
13.5
538
Air in
Air in
Air out
349.5
55.7
121.4
249
17.9
699
500121 259
Bolt pitch for
installation
294~267
285
19.6
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø9.52
Drain hole ø33
2 - 10.3 X 19.3 Oval hole
OBH751

8
MUZ-DM25VA
MUZ-DM35VA
6WIRING DIAGRAM
OBH751

9
Unit : mm
MUZ-DM25VA MUZ-DM35VA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
Muffler
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 OFF
cooling ON
Strainer
#100
Capillary tube
ø 3.0 × ø 1.4 × 260
LEV
Muffler
7REFRIGERANT SYSTEM DIAGRAM
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model Refrigerant piping: m Piping size O.D: mm
Max. Length
A
Max. Height difference
BGas Liquid
MUZ-DM25VA
MUZ-DM35VA 20 12 9.52 6.35
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
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-DM25VA 700 0 0 0 20 40 60 80 100 120 140 160 260
MUZ-DM35VA 720
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.
OBH751

10
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
(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 and dry bulb temperature difference on the left side of the following chart shows the difference between the
indoor intake air wet and dry bulb temperature and the indoor outlet air wet and dry bulb temperature for your reference at
service.
}
}
Cooling
Heating
MUZ-DM25VA MUZ-DM35VA
How to measure the indoor air wet and 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.
PERFORMANCE CURVES8
INDOOR UNIT OUTDOOR UNIT
Wet and dry bulb
thermometers
FRONT VIEW
Wet and dry bulb
thermometers
BACK VIEW
OBH751

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Indoor air Wet-bulb temperature
difference (°C)
Outdoor intake air Dry-bulb temperature (°C)
MUZ-DM25VA
7.2
6.7
6.1
5.6
5.1
4.6
4.1
MUZ-DM35VA
8.0
7.4
6.8
6.2
5.6
5.1
4.5
18 20 25 30 35 40 4645
0.9
1.0
1.1
1.2
1.3
1.4
1.5
Indoor intake air Wet-bulb temperature (°C)
Cooling capacity (at Rated frequency)
Capacity correction factor
22
20
18
26
24
Indoor air Wet-bulb temperature
difference (°C)
Outdoor intake air Dry-bulb temperature (°C)
MUZ-DM25VA MUZ-DM35VA
6.1
5.6
5.1
4.6
4.1
3.6
6.8
6.2
5.6
5.1
4.5
4.0
Total input (Cooling :at Rated frequency)
Input correction factor
22
20
18
18 20 25 30 35 40 4645
0.8
0.9
1.0
1.1
1.2
1.3
Indoor intake air Wet-bulb temperature (°C)
26 24
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)
Heating capacity (at Rated frequency) Total input (Heating at Rated frequency)
Indoor air Wet-bulb temperature
difference (°C)
MUZ-DM25VA MUZ-DM35VA
20.6
19.0
17.4
15.8
14.3
12.7
11.1
9.5
22.9
21.1
19.3
17.6
15.8
14.1
12.3
10.5
NOTE: The above broken lines are for the heating operation without any frost and
defrost operation.
8-1. CAPACITY AND INPUT CURVES
OBH751

12
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
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
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
MUZ-DM25VA
MUZ-DM35VA
(Hz) (Hz) (Hz) (Hz)
(Hz) (Hz) (Hz) (Hz)
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
OBH751

13
8-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION
<Test run 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 varies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.
Outdoor low pressure
MUZ-DM25VA MUZ-DM35VA
4
5
6
7
8
9
3
4
5
6
7
8
(kgf/cm2[Gauge])(MPa [Gauge])
50
18 32
60 70 (%)
(°C)
Ambient temperature(°C)
Ambient humidity(%)
(kgf/cm2[Gauge])(MPa [Gauge])
50
18 32
60 70 (%)
(°C)
Ambient temperature(°C)
Ambient humidity(%)
15 20 25 30 35
0.4
0.5
0.6
0.7
0.8
0.9
15 20 25 30 35
0.3
0.4
0.5
0.6
0.7
0.8
COOL operation
Both indoor and outdoor unit are under the same tempera-
ture/humidity condition.
Operation: TEST RUN OPERATION (Refer to 8-3.)
8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
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])
Dry-bulb temperature (°C) Relative humidity (%)
20 50
25 60
30 70
15 20 25 30 35
2
3
4
5
15 20 25 30 35
3
4
5
6
32
1850 60 70 (%)
(°C)
Outdoor unit current
MUZ-DM25VA MUZ-DM35VA
Ambient temperature (°C)
Ambient humidity(%)
Outdoor current (A)
32
1850 60 70 (%)
(°C)
Ambient temperature (°C)
Ambient humidity(%)
Outdoor current (A)
OBH751

14
0510
15 20 25
1.5
2.0
2.5
3.0
0510
15 20 25
1.5
2.0
2.5
3.0
Outdoor unit current
Ambient temperature (°C)
Outdoor current (A)
Ambient temperature (°C)
Outdoor current (A)
MUZ-DM35VAMUZ-DM25VA
Condition:
Operation: Test run operation (refer to 8-3.)
HEAT operation
Indoor Outdoor
Dry bulb temperature (°C) 20.0 2 7 15 20.0
Wet bulb temperature (°C) 14.5 1 6 12 14.5
OBH751

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PERFORMANCE DATA COOL operation at Rated frequency
MUZ-DM25VA
CAPACITY: 2.5 kW SHF: 0.89 INPUT: 710 W
INDOOR
DB (°C)
INDOOR
WB (°C)
OUTDOOR DB (°C)
21 25 27 30
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21 18 2.94 2.09 0.71 568 2.81 2.00 0.71 596 2.70 1.92 0.71 625 2.60 1.85 0.71 653
21 20 3.06 1.81 0.59 596 2.94 1.73 0.59 632 2.85 1.68 0.59 646 2.75 1.62 0.59 675
22 18 2.94 2.20 0.75 568 2.81 2.11 0.75 596 2.70 2.03 0.75 625 2.60 1.95 0.75 653
22 20 3.06 1.93 0.63 596 2.94 1.85 0.63 632 2.85 1.80 0.63 646 2.75 1.73 0.63 675
22 22 3.19 1.63 0.51 618 3.08 1.57 0.51 657 3.00 1.53 0.51 675 2.88 1.47 0.51 703
23 18 2.94 2.32 0.79 568 2.81 2.22 0.79 596 2.70 2.13 0.79 625 2.60 2.05 0.79 653
23 20 3.06 2.05 0.67 596 2.94 1.97 0.67 632 2.85 1.91 0.67 646 2.75 1.84 0.67 675
23 22 3.19 1.75 0.55 618 3.08 1.69 0.55 657 3.00 1.65 0.55 675 2.88 1.58 0.55 703
24 18 2.94 2.44 0.83 568 2.81 2.33 0.83 596 2.70 2.24 0.83 625 2.60 2.16 0.83 653
24 20 3.06 2.17 0.71 596 2.94 2.09 0.71 632 2.85 2.02 0.71 646 2.75 1.95 0.71 675
24 22 3.19 1.88 0.59 618 3.08 1.81 0.59 657 3.00 1.77 0.59 675 2.88 1.70 0.59 703
24 24 3.35 1.57 0.47 646 3.23 1.52 0.47 682 3.15 1.48 0.47 703 3.05 1.43 0.47 738
25 18 2.94 2.56 0.87 568 2.81 2.45 0.87 596 2.70 2.35 0.87 625 2.60 2.26 0.87 653
25 20 3.06 2.30 0.75 596 2.94 2.20 0.75 632 2.85 2.14 0.75 646 2.75 2.06 0.75 675
25 22 3.19 2.01 0.63 618 3.08 1.94 0.63 657 3.00 1.89 0.63 675 2.88 1.81 0.63 703
25 24 3.35 1.71 0.51 646 3.23 1.64 0.51 682 3.15 1.61 0.51 703 3.05 1.56 0.51 738
26 18 2.94 2.67 0.91 568 2.81 2.56 0.91 596 2.70 2.46 0.91 625 2.60 2.37 0.91 653
26 20 3.06 2.42 0.79 596 2.94 2.32 0.79 632 2.85 2.25 0.79 646 2.75 2.17 0.79 675
26 22 3.19 2.14 0.67 618 3.08 2.06 0.67 657 3.00 2.01 0.67 675 2.88 1.93 0.67 703
26 24 3.35 1.84 0.55 646 3.23 1.77 0.55 682 3.15 1.73 0.55 703 3.05 1.68 0.55 738
26 26 3.45 1.48 0.43 682 3.35 1.44 0.43 717 3.30 1.42 0.43 738 3.20 1.38 0.43 760
27 18 2.94 2.79 0.95 568 2.81 2.67 0.95 596 2.70 2.57 0.95 625 2.60 2.47 0.95 653
27 20 3.06 2.54 0.83 596 2.94 2.44 0.83 632 2.85 2.37 0.83 646 2.75 2.28 0.83 675
27 22 3.19 2.26 0.71 618 3.08 2.18 0.71 657 3.00 2.13 0.71 675 2.88 2.04 0.71 703
27 24 3.35 1.98 0.59 646 3.23 1.90 0.59 682 3.15 1.86 0.59 703 3.05 1.80 0.59 738
27 26 3.45 1.62 0.47 682 3.35 1.57 0.47 717 3.30 1.55 0.47 738 3.20 1.50 0.47 760
28 18 2.94 2.91 0.99 568 2.81 2.78 0.99 596 2.70 2.67 0.99 625 2.60 2.57 0.99 653
28 20 3.06 2.66 0.87 596 2.94 2.56 0.87 632 2.85 2.48 0.87 646 2.75 2.39 0.87 675
28 22 3.19 2.39 0.75 618 3.08 2.31 0.75 657 3.00 2.25 0.75 675 2.88 2.16 0.75 703
28 24 3.35 2.11 0.63 646 3.23 2.03 0.63 682 3.15 1.98 0.63 703 3.05 1.92 0.63 738
28 26 3.45 1.76 0.51 682 3.35 1.71 0.51 717 3.30 1.68 0.51 738 3.20 1.63 0.51 760
29 18 2.94 2.94 1.00 568 2.81 2.81 1.00 596 2.70 2.70 1.00 625 2.60 2.60 1.00 653
29 20 3.06 2.79 0.91 596 2.94 2.67 0.91 632 2.85 2.59 0.91 646 2.75 2.50 0.91 675
29 22 3.19 2.52 0.79 618 3.08 2.43 0.79 657 3.00 2.37 0.79 675 2.88 2.27 0.79 703
29 24 3.35 2.24 0.67 646 3.23 2.16 0.67 682 3.15 2.11 0.67 703 3.05 2.04 0.67 738
29 26 3.45 1.90 0.55 682 3.35 1.84 0.55 717 3.30 1.82 0.55 738 3.20 1.76 0.55 760
30 18 2.94 2.94 1.00 568 2.81 2.81 1.00 596 2.70 2.70 1.00 625 2.60 2.60 1.00 653
30 20 3.06 2.91 0.95 596 2.94 2.79 0.95 632 2.85 2.71 0.95 646 2.75 2.61 0.95 675
30 22 3.19 2.65 0.83 618 3.08 2.55 0.83 657 3.00 2.49 0.83 675 2.88 2.39 0.83 703
30 24 3.35 2.38 0.71 646 3.23 2.29 0.71 682 3.15 2.24 0.71 703 3.05 2.17 0.71 738
30 26 3.45 2.04 0.59 682 3.35 1.98 0.59 717 3.30 1.95 0.59 738 3.20 1.89 0.59 760
31 18 2.94 2.94 1.00 568 2.81 2.81 1.00 596 2.70 2.70 1.00 625 2.60 2.60 1.00 653
31 20 3.06 3.03 0.99 596 2.94 2.91 0.99 632 2.85 2.82 0.99 646 2.75 2.72 0.99 675
31 22 3.19 2.77 0.87 618 3.08 2.68 0.87 657 3.00 2.61 0.87 675 2.88 2.50 0.87 703
31 24 3.35 2.51 0.75 646 3.23 2.42 0.75 682 3.15 2.36 0.75 703 3.05 2.29 0.75 738
31 26 3.45 2.17 0.63 682 3.35 2.11 0.63 717 3.30 2.08 0.63 738 3.20 2.02 0.63 760
32 18 2.94 2.94 1.00 568 2.81 2.81 1.00 596 2.70 2.70 1.00 625 2.60 2.60 1.00 653
32 20 3.06 3.06 1.00 596 2.94 2.94 1.00 632 2.85 2.85 1.00 646 2.75 2.75 1.00 675
32 22 3.19 2.90 0.91 618 3.08 2.80 0.91 657 3.00 2.73 0.91 675 2.88 2.62 0.91 703
32 24 3.35 2.65 0.79 646 3.23 2.55 0.79 682 3.15 2.49 0.79 703 3.05 2.41 0.79 738
32 26 3.45 2.31 0.67 682 3.35 2.24 0.67 717 3.30 2.21 0.67 738 3.20 2.14 0.67 760
NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
OBH751

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PERFORMANCE DATA COOL operation at Rated frequency
MUZ-DM25VA
CAPACITY: 2.5 kW SHF: 0.89 INPUT: 710 W
INDOOR
DB (°C)
INDOOR
WB (°C)
OUTDOOR DB (°C)
35 40 46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21 18 2.45 1.74 0.71 696 2.25 1.60 0.71 738 2.08 1.47 0.71 767
21 20 2.58 1.52 0.59 724 2.40 1.42 0.59 760 2.23 1.31 0.59 802
22 18 2.45 1.84 0.75 696 2.25 1.69 0.75 738 2.08 1.56 0.75 767
22 20 2.58 1.62 0.63 724 2.40 1.51 0.63 760 2.23 1.40 0.63 802
22 22 2.73 1.39 0.51 753 2.55 1.30 0.51 795 2.38 1.21 0.51 824
23 18 2.45 1.94 0.79 696 2.25 1.78 0.79 738 2.08 1.64 0.79 767
23 20 2.58 1.73 0.67 724 2.40 1.61 0.67 760 2.23 1.49 0.67 802
23 22 2.73 1.50 0.55 753 2.55 1.40 0.55 795 2.38 1.31 0.55 824
24 18 2.45 2.03 0.83 696 2.25 1.87 0.83 738 2.08 1.72 0.83 767
24 20 2.58 1.83 0.71 724 2.40 1.70 0.71 760 2.23 1.58 0.71 802
24 22 2.73 1.61 0.59 753 2.55 1.50 0.59 795 2.38 1.40 0.59 824
24 24 2.88 1.35 0.47 781 2.70 1.27 0.47 817 2.55 1.20 0.47 852
25 18 2.45 2.13 0.87 696 2.25 1.96 0.87 738 2.08 1.81 0.87 767
25 20 2.58 1.93 0.75 724 2.40 1.80 0.75 760 2.23 1.67 0.75 802
25 22 2.73 1.72 0.63 753 2.55 1.61 0.63 795 2.38 1.50 0.63 824
25 24 2.88 1.47 0.51 781 2.70 1.38 0.51 817 2.55 1.30 0.51 852
26 18 2.45 2.23 0.91 696 2.25 2.05 0.91 738 2.08 1.89 0.91 767
26 20 2.58 2.03 0.79 724 2.40 1.90 0.79 760 2.23 1.76 0.79 802
26 22 2.73 1.83 0.67 753 2.55 1.71 0.67 795 2.38 1.59 0.67 824
26 24 2.88 1.58 0.55 781 2.70 1.49 0.55 817 2.55 1.40 0.55 852
26 26 3.03 1.30 0.43 809 2.85 1.23 0.43 845 2.68 1.15 0.43 880
27 18 2.45 2.33 0.95 696 2.25 2.14 0.95 738 2.08 1.97 0.95 767
27 20 2.58 2.14 0.83 724 2.40 1.99 0.83 760 2.23 1.85 0.83 802
27 22 2.73 1.93 0.71 753 2.55 1.81 0.71 795 2.38 1.69 0.71 824
27 24 2.88 1.70 0.59 781 2.70 1.59 0.59 817 2.55 1.50 0.59 852
27 26 3.03 1.42 0.47 809 2.85 1.34 0.47 845 2.68 1.26 0.47 880
28 18 2.45 2.43 0.99 696 2.25 2.23 0.99 738 2.08 2.05 0.99 767
28 20 2.58 2.24 0.87 724 2.40 2.09 0.87 760 2.23 1.94 0.87 802
28 22 2.73 2.04 0.75 753 2.55 1.91 0.75 795 2.38 1.78 0.75 824
28 24 2.88 1.81 0.63 781 2.70 1.70 0.63 817 2.55 1.61 0.63 852
28 26 3.03 1.54 0.51 809 2.85 1.45 0.51 845 2.68 1.36 0.51 880
29 18 2.45 2.45 1.00 696 2.25 2.25 1.00 738 2.08 2.08 1.00 767
29 20 2.58 2.34 0.91 724 2.40 2.18 0.91 760 2.23 2.02 0.91 802
29 22 2.73 2.15 0.79 753 2.55 2.01 0.79 795 2.38 1.88 0.79 824
29 24 2.88 1.93 0.67 781 2.70 1.81 0.67 817 2.55 1.71 0.67 852
29 26 3.03 1.66 0.55 809 2.85 1.57 0.55 845 2.68 1.47 0.55 880
30 18 2.45 2.45 1.00 696 2.25 2.25 1.00 738 2.08 2.08 1.00 767
30 20 2.58 2.45 0.95 724 2.40 2.28 0.95 760 2.23 2.11 0.95 802
30 22 2.73 2.26 0.83 753 2.55 2.12 0.83 795 2.38 1.97 0.83 824
30 24 2.88 2.04 0.71 781 2.70 1.92 0.71 817 2.55 1.81 0.71 852
30 26 3.03 1.78 0.59 809 2.85 1.68 0.59 845 2.68 1.58 0.59 880
31 18 2.45 2.45 1.00 696 2.25 2.25 1.00 738 2.08 2.08 1.00 767
31 20 2.58 2.55 0.99 724 2.40 2.38 0.99 760 2.23 2.20 0.99 802
31 22 2.73 2.37 0.87 753 2.55 2.22 0.87 795 2.38 2.07 0.87 824
31 24 2.88 2.16 0.75 781 2.70 2.03 0.75 817 2.55 1.91 0.75 852
31 26 3.03 1.91 0.63 809 2.85 1.80 0.63 845 2.68 1.69 0.63 880
32 18 2.45 2.45 1.00 696 2.25 2.25 1.00 738 2.08 2.08 1.00 767
32 20 2.58 2.58 1.00 724 2.40 2.40 1.00 760 2.23 2.23 1.00 802
32 22 2.73 2.48 0.91 753 2.55 2.32 0.91 795 2.38 2.16 0.91 824
32 24 2.88 2.27 0.79 781 2.70 2.13 0.79 817 2.55 2.01 0.79 852
32 26 3.03 2.03 0.67 809 2.85 1.91 0.67 845 2.68 1.79 0.67 880
NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
OBH751

17
PERFORMANCE DATA COOL operation at Rated frequency
MUZ-DM35VA
CAPACITY: 3.15 kW SHF: 0.87 INPUT: 1020 W
INDOOR
DB (°C)
INDOOR
WB (°C)
OUTDOOR DB (°C)
21 25 27 30
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21 18 3.70 2.55 0.69 816 3.54 2.45 0.69 857 3.40 2.35 0.69 898 3.28 2.26 0.69 938
21 20 3.86 2.20 0.57 857 3.70 2.11 0.57 908 3.59 2.05 0.57 928 3.47 1.98 0.57 969
22 18 3.70 2.70 0.73 816 3.54 2.59 0.73 857 3.40 2.48 0.73 898 3.28 2.39 0.73 938
22 20 3.86 2.35 0.61 857 3.70 2.26 0.61 908 3.59 2.19 0.61 928 3.47 2.11 0.61 969
22 22 4.02 1.97 0.49 887 3.87 1.90 0.49 944 3.78 1.85 0.49 969 3.62 1.78 0.49 1010
23 18 3.70 2.85 0.77 816 3.54 2.73 0.77 857 3.40 2.62 0.77 898 3.28 2.52 0.77 938
23 20 3.86 2.51 0.65 857 3.70 2.41 0.65 908 3.59 2.33 0.65 928 3.47 2.25 0.65 969
23 22 4.02 2.13 0.53 887 3.87 2.05 0.53 944 3.78 2.00 0.53 969 3.62 1.92 0.53 1010
24 18 3.70 3.00 0.81 816 3.54 2.87 0.81 857 3.40 2.76 0.81 898 3.28 2.65 0.81 938
24 20 3.86 2.66 0.69 857 3.70 2.55 0.69 908 3.59 2.48 0.69 928 3.47 2.39 0.69 969
24 22 4.02 2.29 0.57 887 3.87 2.21 0.57 944 3.78 2.15 0.57 969 3.62 2.06 0.57 1010
24 24 4.22 1.90 0.45 928 4.06 1.83 0.45 979 3.97 1.79 0.45 1010 3.84 1.73 0.45 1061
25 18 3.70 3.15 0.85 816 3.54 3.01 0.85 857 3.40 2.89 0.85 898 3.28 2.78 0.85 938
25 20 3.86 2.82 0.73 857 3.70 2.70 0.73 908 3.59 2.62 0.73 928 3.47 2.53 0.73 969
25 22 4.02 2.45 0.61 887 3.87 2.36 0.61 944 3.78 2.31 0.61 969 3.62 2.21 0.61 1010
25 24 4.22 2.07 0.49 928 4.06 1.99 0.49 979 3.97 1.94 0.49 1010 3.84 1.88 0.49 1061
26 18 3.70 3.29 0.89 816 3.54 3.15 0.89 857 3.40 3.03 0.89 898 3.28 2.92 0.89 938
26 20 3.86 2.97 0.77 857 3.70 2.85 0.77 908 3.59 2.77 0.77 928 3.47 2.67 0.77 969
26 22 4.02 2.61 0.65 887 3.87 2.52 0.65 944 3.78 2.46 0.65 969 3.62 2.35 0.65 1010
26 24 4.22 2.24 0.53 928 4.06 2.15 0.53 979 3.97 2.10 0.53 1010 3.84 2.04 0.53 1061
26 26 4.35 1.78 0.41 979 4.22 1.73 0.41 1030 4.16 1.70 0.41 1061 4.03 1.65 0.41 1091
27 18 3.70 3.44 0.93 816 3.54 3.30 0.93 857 3.40 3.16 0.93 898 3.28 3.05 0.93 938
27 20 3.86 3.13 0.81 857 3.70 3.00 0.81 908 3.59 2.91 0.81 928 3.47 2.81 0.81 969
27 22 4.02 2.77 0.69 887 3.87 2.67 0.69 944 3.78 2.61 0.69 969 3.62 2.50 0.69 1010
27 24 4.22 2.41 0.57 928 4.06 2.32 0.57 979 3.97 2.26 0.57 1010 3.84 2.19 0.57 1061
27 26 4.35 1.96 0.45 979 4.22 1.90 0.45 1030 4.16 1.87 0.45 1061 4.03 1.81 0.45 1091
28 18 3.70 3.59 0.97 816 3.54 3.44 0.97 857 3.40 3.30 0.97 898 3.28 3.18 0.97 938
28 20 3.86 3.28 0.85 857 3.70 3.15 0.85 908 3.59 3.05 0.85 928 3.47 2.95 0.85 969
28 22 4.02 2.93 0.73 887 3.87 2.83 0.73 944 3.78 2.76 0.73 969 3.62 2.64 0.73 1010
28 24 4.22 2.57 0.61 928 4.06 2.48 0.61 979 3.97 2.42 0.61 1010 3.84 2.34 0.61 1061
28 26 4.35 2.13 0.49 979 4.22 2.07 0.49 1030 4.16 2.04 0.49 1061 4.03 1.98 0.49 1091
29 18 3.70 3.70 1.00 816 3.54 3.54 1.00 857 3.40 3.40 1.00 898 3.28 3.28 1.00 938
29 20 3.86 3.43 0.89 857 3.70 3.29 0.89 908 3.59 3.20 0.89 928 3.47 3.08 0.89 969
29 22 4.02 3.09 0.77 887 3.87 2.98 0.77 944 3.78 2.91 0.77 969 3.62 2.79 0.77 1010
29 24 4.22 2.74 0.65 928 4.06 2.64 0.65 979 3.97 2.58 0.65 1010 3.84 2.50 0.65 1061
29 26 4.35 2.30 0.53 979 4.22 2.24 0.53 1030 4.16 2.20 0.53 1061 4.03 2.14 0.53 1091
30 18 3.70 3.70 1.00 816 3.54 3.54 1.00 857 3.40 3.40 1.00 898 3.28 3.28 1.00 938
30 20 3.86 3.59 0.93 857 3.70 3.44 0.93 908 3.59 3.34 0.93 928 3.47 3.22 0.93 969
30 22 4.02 3.25 0.81 887 3.87 3.14 0.81 944 3.78 3.06 0.81 969 3.62 2.93 0.81 1010
30 24 4.22 2.91 0.69 928 4.06 2.80 0.69 979 3.97 2.74 0.69 1010 3.84 2.65 0.69 1061
30 26 4.35 2.48 0.57 979 4.22 2.41 0.57 1030 4.16 2.37 0.57 1061 4.03 2.30 0.57 1091
31 18 3.70 3.70 1.00 816 3.54 3.54 1.00 857 3.40 3.40 1.00 898 3.28 3.28 1.00 938
31 20 3.86 3.74 0.97 857 3.70 3.59 0.97 908 3.59 3.48 0.97 928 3.47 3.36 0.97 969
31 22 4.02 3.41 0.85 887 3.87 3.29 0.85 944 3.78 3.21 0.85 969 3.62 3.08 0.85 1010
31 24 4.22 3.08 0.73 928 4.06 2.97 0.73 979 3.97 2.90 0.73 1010 3.84 2.81 0.73 1061
31 26 4.35 2.65 0.61 979 4.22 2.57 0.61 1030 4.16 2.54 0.61 1061 4.03 2.46 0.61 1091
32 18 3.70 3.70 1.00 816 3.54 3.54 1.00 857 3.40 3.40 1.00 898 3.28 3.28 1.00 938
32 20 3.86 3.86 1.00 857 3.70 3.70 1.00 908 3.59 3.59 1.00 928 3.47 3.47 1.00 969
32 22 4.02 3.57 0.89 887 3.87 3.45 0.89 944 3.78 3.36 0.89 969 3.62 3.22 0.89 1010
32 24 4.22 3.25 0.77 928 4.06 3.13 0.77 979 3.97 3.06 0.77 1010 3.84 2.96 0.77 1061
32 26 4.35 2.83 0.65 979 4.22 2.74 0.65 1030 4.16 2.70 0.65 1061 4.03 2.62 0.65 1091
NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
OBH751

18
PERFORMANCE DATA COOL operation at Rated frequency
MUZ-DM35VA
CAPACITY: 3.15 kW SHF: 0.87 INPUT: 1020 W
INDOOR
DB (°C)
INDOOR
WB (°C)
OUTDOOR DB (°C)
35 40 46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21 18 3.09 2.13 0.69 1000 2.84 1.96 0.69 1061 2.61 1.80 0.69 1102
21 20 3.24 1.85 0.57 1040 3.02 1.72 0.57 1091 2.80 1.60 0.57 1153
22 18 3.09 2.25 0.73 1000 2.84 2.07 0.73 1061 2.61 1.91 0.73 1102
22 20 3.24 1.98 0.61 1040 3.02 1.84 0.61 1091 2.80 1.71 0.61 1153
22 22 3.43 1.68 0.49 1081 3.21 1.57 0.49 1142 2.99 1.47 0.49 1183
23 18 3.09 2.38 0.77 1000 2.84 2.18 0.77 1061 2.61 2.01 0.77 1102
23 20 3.24 2.11 0.65 1040 3.02 1.97 0.65 1091 2.80 1.82 0.65 1153
23 22 3.43 1.82 0.53 1081 3.21 1.70 0.53 1142 2.99 1.59 0.53 1183
24 18 3.09 2.50 0.81 1000 2.84 2.30 0.81 1061 2.61 2.12 0.81 1102
24 20 3.24 2.24 0.69 1040 3.02 2.09 0.69 1091 2.80 1.93 0.69 1153
24 22 3.43 1.96 0.57 1081 3.21 1.83 0.57 1142 2.99 1.71 0.57 1183
24 24 3.62 1.63 0.45 1122 3.40 1.53 0.45 1173 3.21 1.45 0.45 1224
25 18 3.09 2.62 0.85 1000 2.84 2.41 0.85 1061 2.61 2.22 0.85 1102
25 20 3.24 2.37 0.73 1040 3.02 2.21 0.73 1091 2.80 2.05 0.73 1153
25 22 3.43 2.09 0.61 1081 3.21 1.96 0.61 1142 2.99 1.83 0.61 1183
25 24 3.62 1.78 0.49 1122 3.40 1.67 0.49 1173 3.21 1.57 0.49 1224
26 18 3.09 2.75 0.89 1000 2.84 2.52 0.89 1061 2.61 2.33 0.89 1102
26 20 3.24 2.50 0.77 1040 3.02 2.33 0.77 1091 2.80 2.16 0.77 1153
26 22 3.43 2.23 0.65 1081 3.21 2.09 0.65 1142 2.99 1.95 0.65 1183
26 24 3.62 1.92 0.53 1122 3.40 1.80 0.53 1173 3.21 1.70 0.53 1224
26 26 3.81 1.56 0.41 1163 3.59 1.47 0.41 1214 3.37 1.38 0.41 1265
27 18 3.09 2.87 0.93 1000 2.84 2.64 0.93 1061 2.61 2.43 0.93 1102
27 20 3.24 2.63 0.81 1040 3.02 2.45 0.81 1091 2.80 2.27 0.81 1153
27 22 3.43 2.37 0.69 1081 3.21 2.22 0.69 1142 2.99 2.06 0.69 1183
27 24 3.62 2.06 0.57 1122 3.40 1.94 0.57 1173 3.21 1.83 0.57 1224
27 26 3.81 1.72 0.45 1163 3.59 1.62 0.45 1214 3.37 1.52 0.45 1265
28 18 3.09 2.99 0.97 1000 2.84 2.75 0.97 1061 2.61 2.54 0.97 1102
28 20 3.24 2.76 0.85 1040 3.02 2.57 0.85 1091 2.80 2.38 0.85 1153
28 22 3.43 2.51 0.73 1081 3.21 2.35 0.73 1142 2.99 2.18 0.73 1183
28 24 3.62 2.21 0.61 1122 3.40 2.08 0.61 1173 3.21 1.96 0.61 1224
28 26 3.81 1.87 0.49 1163 3.59 1.76 0.49 1214 3.37 1.65 0.49 1265
29 18 3.09 3.09 1.00 1000 2.84 2.84 1.00 1061 2.61 2.61 1.00 1102
29 20 3.24 2.89 0.89 1040 3.02 2.69 0.89 1091 2.80 2.50 0.89 1153
29 22 3.43 2.64 0.77 1081 3.21 2.47 0.77 1142 2.99 2.30 0.77 1183
29 24 3.62 2.35 0.65 1122 3.40 2.21 0.65 1173 3.21 2.09 0.65 1224
29 26 3.81 2.02 0.53 1163 3.59 1.90 0.53 1214 3.37 1.79 0.53 1265
30 18 3.09 3.09 1.00 1000 2.84 2.84 1.00 1061 2.61 2.61 1.00 1102
30 20 3.24 3.02 0.93 1040 3.02 2.81 0.93 1091 2.80 2.61 0.93 1153
30 22 3.43 2.78 0.81 1081 3.21 2.60 0.81 1142 2.99 2.42 0.81 1183
30 24 3.62 2.50 0.69 1122 3.40 2.35 0.69 1173 3.21 2.22 0.69 1224
30 26 3.81 2.17 0.57 1163 3.59 2.05 0.57 1214 3.37 1.92 0.57 1265
31 18 3.09 3.09 1.00 1000 2.84 2.84 1.00 1061 2.61 2.61 1.00 1102
31 20 3.24 3.15 0.97 1040 3.02 2.93 0.97 1091 2.80 2.72 0.97 1153
31 22 3.43 2.92 0.85 1081 3.21 2.73 0.85 1142 2.99 2.54 0.85 1183
31 24 3.62 2.64 0.73 1122 3.40 2.48 0.73 1173 3.21 2.35 0.73 1224
31 26 3.81 2.33 0.61 1163 3.59 2.19 0.61 1214 3.37 2.06 0.61 1265
32 18 3.09 3.09 1.00 1000 2.84 2.84 1.00 1061 2.61 2.61 1.00 1102
32 20 3.24 3.24 1.00 1040 3.02 3.02 1.00 1091 2.80 2.80 1.00 1153
32 22 3.43 3.06 0.89 1081 3.21 2.86 0.89 1142 2.99 2.66 0.89 1183
32 24 3.62 2.79 0.77 1122 3.40 2.62 0.77 1173 3.21 2.47 0.77 1224
32 26 3.81 2.48 0.65 1163 3.59 2.33 0.65 1214 3.37 2.19 0.65 1265
NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
OBH751

19
PERFORMANCE DATA HEAT operation at Rated frequency
MUZ-DM25VA
CAPACITY: 3.15 kW INPUT: 850 W
INDOOR
DB (°C)
OUTDOOR WB (°C)
-10 -5 0 5 10 15 20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
15 1.98 553 2.39 663 2.80 748 3.21 808 3.62 859 4.00 884 4.41 901
21 1.89 595 2.27 706 2.68 782 3.06 842 3.47 884 3.84 910 4.24 944
26 1.70 638 2.11 748 2.49 825 2.90 884 3.31 927 3.69 952 4.10 978
MUZ-DM35VA
CAPACITY: 3.6 kW INPUT: 975 W
INDOOR
DB (°C)
OUTDOOR WB (°C)
-10 -5 0 5 10 15 20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
15 2.27 634 2.74 761 3.20 858 3.67 926 4.14 985 4.57 1014 5.04 1034
21 2.16 683 2.59 809 3.06 897 3.49 965 3.96 1014 4.39 1043 4.84 1082
26 1.94 731 2.41 858 2.84 946 3.31 1014 3.78 1063 4.21 1092 4.68 1121
NOTE Q: Total capacity (kW) INPUT : Total power input (W) DB: Dry-bulb temperature WB: Wet-bulb temperature
OBH751

20
MUZ-DM25VA MUZ-DM35VA
9-2. R.V. COIL CONTROL
R.V. COIL CONTROL
Heating . . . . . . . . . . . . . . . . . OFF
Cooling . . . . . . . . . . . . . . . . . ON
Dry . . . . . . . . . . . . . . . . . . . . ON
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
ON
OFF
ON
OFF
Outdoor fan
motor
Compressor
5 seconds 15 seconds
ON
OFF
Compressor
Outdoor fan
motor
R.V.coil ON
OFF
ON
OFF
<COOL> 5 seconds <HEAT> 5 seconds
9-1. OUTDOOR FAN MOTOR CONTROL
The fan motor turns ON/OFF, interlocking with the compressor.
[ON] The fan motor turns ON 5 seconds before the compressor starts up.
[OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.
9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor Purpose
Actuator
Compressor LEV Outdoor fan
motor R.V. coil Indoor fan motor
Discharge temperature thermistor Protection ○○
Indoor coil temperature thermistor Cooling: Coil frost prevention ○
Heating: High pressure protection
○
Defrost thermistor
Cooling: High pressure protection
○○○
Heating: Defrosting ○○○○○
Fin temperature thermistor Protection ○○
9ACTUATOR CONTROL
OBH751