Mitsubishi PMH-P1.6BA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. COMBINATION OF INDOOR AND OUTDOOR UNITS ···2
2. SAFETY PRECAUTION······································2
3. PART NAMES AND FUNCTIONS·······················4
4. SPECIFICATIONS···············································7
5. DATA··································································10
6. OUTLINES AND DIMENSIONS ························19
7. WIRING DIAGRAM ···············································20
8.
REFRIGERANT SYSTEM DIAGRAM ·····················21
9. TROUBLE SHOOTING ·····································21
10. DISASSEMBLY PROCEDURE ·························23
11. PARTS LIST ······················································26
12. OPTIONAL PARTS············································29
Indoor unit
[Model names] [Service Ref.]
No. OC238
2001
Refer to the OCT03 REVISED
EDITION-C as regarding control
relation.
This manual does not cover the
following outdoor units. When
servicing them, please refer to
the service manual No.OC180
REVISED EDITION-A and this
manual in a set.
[Service Ref.]
<OC180 REVISED EDITION-A>
PUH-P1.6VGA
PUH-P1.6YGA
PUH-P2VGA
PUH-P2YGA
INDOOR UNIT
Ceiling Cassettes
Series PMH
FILTER
CHECK MODE
TEST RUN
REMOTE CONTROLLER
R407C
PMH-P1.6BA PMH-P1.6BA
PMH-P2BA PMH-P2BA

SAFETY PRECAUTION
2
2
1COMBINATION OF INDOOR AND OUTDOOR UNITS
Cautions for using with the outdoor unit which adopts R407C refrigerant.
·Do not use the existing refrigerant piping.
-The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant of
the new unit to deteriorate.
·Do not use copper pipes which are broken, deformed or discolour .
In addition, be sure that the inner surfaces of the pipes are clean, free of hazardous sulphur and oxides, or have no dust /
dirt, shaving particles, oils, moisture or any other contamination.
-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will
result.
·Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before
brazing. (Store elbows and other joints in a plastic bag.)
-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.
·Use ester oil, ether oil or alkyl benzene (small amount) as the lubricant to coat flares and flange connections.
-The lubricant will degrade if it is mixed with a large amount of mineral oil.
Use liquid refrigerant to fill the system.
-If gas refrigerant is used to fill the system, the composition of the refrigerant in the cylinder will change and performance
may drop.
·Do not use a refrigerant other than R407C.
-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricant to deteriorate.
·Use a vacuum pump with a reverse flow check valve.
-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant to deteriorate.
·Do not use the following tools that are used with conventional refrigerant.
(Gauge manifold , charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge,
refrigerant recovery equipment)
-If the conventional refrigerant and lubricant are mixed in the R407C, the refrigerant may deteriorated.
-If water is mixed in the R407C, the lubricant may deteriorate.
-Since R407C does not contain any chlorine, gas leak detectors for conventional refrigerant will not react to it.
·Do not use a charging cylinder.
-Using a charging cylinder may cause the refrigerant to deteriorate.
·Be especially careful when managing the tools.
-if dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.
·Do not use the drier which is sold in the field.
-The drier for R407C refrigerant is per-attached to outdoor unit refrigerant circuit.
-Some drier in the field are not in conformity with R407C refrigerant .
Outdoor unit
PUH-P
PMH-P1.6BA
PMH-P2BA
2YGA
—
2VGA
—
1.6YGA
—
1.6VGA
—
Indoor unit

3
[3] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
[1] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R407C.
5Adapter for reverse flow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
[2] Notice on repair service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.

4
3PART NAMES AND FUNCTIONS
● Indoor (Main) Unit
PMH-P1.6BA
PMH-P2BA
Guide vane
Air flow can be changed to horinzontally
by moving the Guide vane to the left or right.
Air intake
Inhales air from room.
Filters
Remove dust and pollutants
from inhaled air.
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Horizontal Air Outlet

5
TIMER button
● Remote controller
● Operation buttons
● Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
This switches between
continuous operation and
the timer operation.
This sets the fan speed.
AIR SPEED button
Press this button to
switch the cooler elec-
tronic dry (dehumidify)
automatic and heater
modes.
OPERATION SWITCH
button
This sets the room tempera-
ture The temperature setting
can be performed in 1°C
units
Setting range
Cooler 19°C to 30°C
Heater 17°C to 28°C
TEMP. ADJUSTMENT
button
This sets of switches the
current time. start time and
stop time.
TIME SETTING button
(This button does not
operate in this model)
This switches the hori-
zontal fan motion ON
and OFF.
LOUVER button
This switches between the
operation and stop modes
each time it is pressed. The
lamp on this button lights dur-
ing operation.
ON/OFF button
This adjusts the vertical angle
of the ventilation.
AIR DIRECTION button
Only press this button to per-
form an inspection check or
test operation Do not use it
for normal operation.
CHECK-TEST RUN button
This resets the filter cleaning
indication display.
FILTER button
This sets the ventilation fan
speed.
VENTILATION button
This adjust the current time, start
time and stop time.
TIMER ADJUSTMENT button

6
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a
malfunction.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button
and TEMP. adjustment button do not operate.
●“NOT AVAILABLE”is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “H0”is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0”indication disappear then start the operation.
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
TIMER display
This indicates when the continuous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
This indicates when the standby
mode is set from the time the sleep
operation starts until the heating air
is discharged.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
CLOCK display
The current time , start time and stop
time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
●Display
In this display example on the bot-
tom left, a condition where all dis-
play lamps light is shown for expla-
nation purposes although this differs
from actual operation.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
POWER display
This lamp lights when electricity is
supplied to the unit.
SET TEMPERATURE display
This displays the selected setting
temperature.
FAN SPEED display
The selected fan speed is displayed.
ROOM TEMPERATURE display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8°to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8°and flashes
39°C when the actual temperature is
greater than 39°C.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
FILTER display
This lamp lights when the filter need
to be cleaned.
AIR DIRECTION display
This displays the air direction.

Service Ref.
Item
Btu/h
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kW
A
A
kW
W
kW
K
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Function
Capacity
Total input
Service Ref.
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Lo / Mi1 / Mi2 / Hi)
External static pressure
Operation control & Thermostat
Noise level(Lo / Mi1 / Mi2 / Hi)
Unit drain pipe I.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
PMH-P1.6BA
Cooling
14,800
4,350
1.59
0.06
0.29
0.32
1.67
35
RE277VHSM
w1
Heating
16,900
4,950
1.64
0.06
0.29
0.32
1.76
19
RE277YFKM
w2
W
D
H
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
PMH-P1.6BA
Single, 50Hz, 220 / 230 / 240V
Unit : Galvanized sheets with gray heat insulation, Grille munsell 0.98Y 8.99/0.63
Plate fin coil
Lineflow fan (direct) x 1
0.028
7.0 / 8.0 / 9.0 / 10.0(247 / 282 / 318 / 353)
0(direct blow)
Remote controller & built-in
34-36-38-40
26(1-1/32)
Munsell 5Y 8/1
Linear Expansion Valve
Hermetic
1.3
Line start
28
Plate fin coil
Propeller (direct) x 1
0.070
45(1,590)
Reverse cycle
46
48
900(35-7/16)
330+20(13+3/4)
650(25-5/8)
55(121)
R407C
2.6(5.7)
1.2(Ester)MEL56
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 40m
Max. 40m
Notes1. Rating Conditions (ISO T1)
Cooling : Indoor : D.B. 27˚C(80˚F), W.B. 19˚C (66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C (75˚F)
Heating : Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C (43˚F)
Refrigerant piping length (one way) : 5m (16ft)
2. Guaranteed operating range
Upper limit
Lower limit
Upper limit
Lower limit
Indoor
D.B. 35˚C W.B. 22.5˚C
D.B. 19˚C W.B. 15˚C
D.B. 28˚C
D.B. 17˚C
Outdoor
D.B. 46˚C
D.B. -5˚C
D.B. 24˚C W.B. 18˚C
D.B. -11˚C W.B. -12˚C
Cooling
Heating
UNIT : 854(33-5/8) PANEL : 1000(39-3/8)
UNIT : 395(15-9/16) PANEL : 470(18-1/2)
UNIT : 230(9-1/16) PANEL : 30(1-3/16)
UNIT : 14(31) PANEL : 3.0(6.6)
PUH-P1.6VGA PUH-P1.6YGA PUH-P1.6VGA PUH-P1.6YGA
Single, 50Hz,
220 / 230 / 240V
7.21
3-phase, 50Hz,
380 / 400 / 415V(4wires)
2.43
Single, 50Hz,
220 / 230 / 240V
7.5
3-phase, 50Hz,
380 / 400 / 415V(4wires)
2.53
w1: Inner thermostat, HP switch, Discharge thermo.
w2: Thermal relay, Discharge thermo, HP switch, Anti-phase protector.
3. Above data based on indicated voltage
Indoor Unit 1 phase 230V 50Hz
Outdoor Unit 1 phase 230V 50Hz
3 phase 400V 50Hz
7
SPECIFICATIONS4
4-1. SPECIFICATIONS

8
Service Ref.
Item
Btu/h
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kW
A
A
kW
W
kW
K
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Function
Capacity
Total input
Service Ref.
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Lo / Mi1 / Mi2 / Hi)
External static pressure
Operation control & Thermostat
Noise level(Lo / Mi1 / Mi2 / Hi)
Unit drain pipe I.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
PMH-P2BA
Cooling
18,300
5,350
2.31
0.06
0.29
0.32
2.44
71
NE38VMJM
w1
Heating
21,200
6,200
2.37
0.06
0.29
0.32
2.53
29
NE38YEJM
w2
W
D
H
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
PMH-P2BA
Single, 50Hz, 220 / 230 / 240V
Unit : Galvanized sheets with gray heat insulation, Grille munsell 0.98Y 8.99/0.63
Plate fin coil
Lineflow fan (direct) x 1
0.028
8.0 / 9.0 / 10.0 / 11.0(282 / 318 / 353 / 388)
0(direct blow)
Remote controller & built-in
36-38-40-42
26(1-1/32)
Munsell 5Y 8/1
Linear Expansion Valve
Hermetic
1.7
Line start
35
Plate fin coil
Propeller (direct) x 1
0.070
55(1,940)
Reverse cycle
48
49
900(35-7/16)
330+20(13+3/4)
855(33-5/8)
71(157)
R407C
3.1(6.8)
1.2(Ester)MEL56
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 40m
Max. 40m
Notes1. Rating Conditions (ISO T1)
Cooling : Indoor : D.B. 27˚C(80˚F), W.B. 19˚C (66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C (75˚F)
Heating : Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C (43˚F)
Refrigerant piping length (one way) : 5m (16ft)
2. Guaranteed operating range
Upper limit
Lower limit
Upper limit
Lower limit
Indoor
D.B. 35˚C W.B. 22.5˚C
D.B. 19˚C W.B. 15˚C
D.B. 28˚C
D.B. 17˚C
Outdoor
D.B. 46˚C
D.B. -5˚C
D.B. 24˚C W.B. 18˚C
D.B. -11˚C W.B. -12˚C
Cooling
Heating
UNIT : 854(33-5/8) PANEL : 1000(39-3/8)
UNIT : 395(15-9/16) PANEL : 470(18-1/2)
UNIT : 230(9-1/16) PANEL : 30(1-3/16)
UNIT : 14(31) PANEL : 3.0(6.6)
PUH-P2VGA PUH-P2YGA PUH-P2VGA PUH-P2YGA
Single, 50Hz,
220 / 230 / 240V
10.91
3-phase, 50Hz,
380 / 400 / 415V(4wires)
3.73
Single, 50Hz,
220 / 230 / 240V
11.21
3-phase, 50Hz,
380 / 400 / 415V(4wires)
3.73
w1: Inner thermostat, HP switch, Discharge thermo.
w2: Thermal relay, Discharge thermo, HP switch, Anti-phase protector.
3. Above data based on indicated voltage
Indoor Unit 1 phase 230V 50Hz
Outdoor Unit 1 phase 230V 50Hz
3 phase 400V 50Hz

4-2. Air capacity taken from outside
50.0
-50.0
-100.00.0 0.5 1.0
Air flow (m3/min)
2 intakes
1 intake
Characteristic diagram of air capacity taken from outside
Static pressure (Pa)
1.5 2.0 2.5
0.0
PMH-P1.6BA
PMH-P2BA 10.0m3/min
11.0m3/min 2.0m3/min 2.2m3/min
Air flow
(Hi) Air capacity taken outside
PMH-P·BA series are possible to be taken air from outside.
When taking air from the outside, the duct fan can be used to.
The air capacity should be 20% or less of the air flow SPEC(Hi).
Q…Planned amount of fresh air intake <m3/min>
A…Static pressure loss of fresh air intake duct system with air flow amount Q <Pa>
B…Forced static pressure at air conditioner inlet with air flow amount Q <Pa>
C…Static pressure of booster fan with air flow amount Q <Pa>
D…Static pressure loss increase amount of fresh air intake dust system for air flow amount Q <Pa>
E…Static pressure of indoor unit with air flow amount Q <Pa>
Qa…Estimated amount of fresh air intake with out D <Pa>
(Knock out)
4-{2.8
Flesh air intake hole (Knock out)
Flesh air intake hole
90-
{122
{100
108
250 288.5
Q
0
BA
C
1
2
3
Curve in the
left praphs.
Duct characteristics
at site
Q
A
EC
Q
Qa
AD
How to read curves
9

10
5DATA
5-1. PERFORMANCE DATA
1) COOLING CAPACITY(1)
PMH-P1.6BA
Outdoor intake air D.B.(°C)
20 25 30
Indoor
Intake air
D.B.(°C)
Indoor
Intake air
W.B.(°C)
20
20
20
22
22
22
24
24
24
24
26
26
26
26
28
28
28
28
30
30
30
30
32
32
32
32
34
34
34
34
16
18
20
16
18
20
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
CA
4307
4611
4959
4307
4611
4959
4307
4611
4959
5285
4307
4611
4959
5285
4307
4611
4959
5285
4307
4611
4959
5285
4307
4611
4959
5285
4307
4611
4959
5285
SHC(W)
2584
2213
1785
2928
2582
2182
3273
2951
2579
2114
3617
3320
2975
2537
3962
3689
3372
2960
4307
4058
3769
3383
4307
4427
4166
3805
4307
4611
4562
4228
SHF
0.60
0.48
0.36
0.68
0.56
0.44
0.76
0.64
0.52
0.40
0.84
0.72
0.60
0.48
0.92
0.80
0.68
0.56
1.00
0.88
0.76
0.64
1.00
0.96
0.84
0.72
1.00
1.00
0.92
0.80
SHF
0.60
0.48
0.36
0.68
0.56
0.44
0.76
0.64
0.52
0.40
0.84
0.72
0.60
0.48
0.92
0.80
0.68
0.56
1.00
0.88
0.76
0.64
1.00
0.96
0.84
0.72
1.00
1.00
0.92
0.80
SHF
0.60
0.48
0.36
0.68
0.56
0.44
0.76
0.64
0.52
0.40
0.84
0.72
0.60
0.48
0.92
0.80
0.68
0.56
1.00
0.88
0.76
0.64
1.00
0.96
0.84
0.72
1.00
1.00
0.92
0.80
P.C.
1.27
1.30
1.34
1.27
1.30
1.34
1.27
1.30
1.34
1.37
1.27
1.30
1.34
1.37
1.27
1.30
1.34
1.37
1.27
1.30
1.34
1.37
1.27
1.30
1.34
1.37
1.27
1.30
1.34
1.37
CA
4176
4481
4850
4176
4481
4850
4176
4481
4850
5177
4176
4481
4850
5177
4176
4481
4850
5177
4176
4481
4850
5177
4176
4481
4850
5177
4176
4481
4850
5177
SHC(W)
2506
2151
1746
2840
2509
2134
3174
2868
2522
2071
3508
3226
2910
2485
3842
3584
3298
2899
4176
3943
3686
3313
4176
4301
4074
3727
4176
4481
4462
4141
P.C.
1.34
1.37
1.40
1.34
1.37
1.40
1.34
1.37
1.40
1.45
1.34
1.37
1.40
1.45
1.34
1.37
1.40
1.45
1.34
1.37
1.40
1.45
1.34
1.37
1.40
1.45
1.34
1.37
1.40
1.45
CA
4046
4328
4720
4046
4328
4720
4046
4328
4720
5046
4046
4328
4720
5046
4046
4328
4720
5046
4046
4328
4720
5046
4046
4328
4720
5046
4046
4328
4720
5046
SHC(W)
2427
2078
1699
2751
2424
2077
3075
2770
2454
2048
3398
3116
2832
2422
3722
3463
3209
2826
4046
3809
3587
3229
4046
4155
3965
3633
4046
4328
4342
4037
P.C.
1.42
1.46
1.49
1.42
1.46
1.49
1.42
1.46
1.49
1.54
1.42
1.46
1.49
1.54
1.42
1.46
1.49
1.54
1.42
1.46
1.49
1.54
1.42
1.46
1.49
1.54
1.42
1.46
1.49
1.54
SHC(W) : Sensible heat capacity
SHF : Sensible heat factor
Note CA : Capacity (W)
P.C. : Power consumption (kW)
Above data based on indicated voltage
Indoor unit : 1 phase 230V 50Hz
Outdoor unit : 1 phase 230V 50Hz / 3 phase 400V 50Hz