Hiyasu HS-9U2IM User manual

HS-9U2IM_HOS-18U2IM
HS-9U11IM_HS-12U11IM_HOS-21U11IM
Service Manual
Applied to:
Multi Split Type
Heat Pump Air Conditioners
www.enindel.com

1. Product features
2. Specification
3. Dimensions
4. Refrigeration cycle diagram
5. Operation limits
6. Indoor unit combination
7. Wiring diagram
8. Electric control functions
9. Troubleshooting
10.Exploded view
Annex 1 Characteristic of temp. sensor
Annex 2 Reference data
CONTENT
www.enindel.com

-1-
Service manual
1 Product Features
1.1 Powerful at cooling/heating.
1.2 Low voltage start-up function.
1.3 Anti-icing function at cooling mode.
1.4 Anti-cold air function at heating mode.
1.5 Auto-defrosting.
1.6 Outdoor electric current protection
1.7 Temperature protection of the outdoor compressor top.
1.8 Error self diagnosis function.
1.9 Free connection between indoor and outdoor unit
www.enindel.com

-2-
Service manual
2 Specification
2.1 Alfa series Model
Power supply Ph-V-Hz
Capacity Btu/h
Input W
Cooling
Rated current A
Capacity Btu/h
Input W
Heating
Rated current A
Model
Brand
Input W
Capacitor uF
Indoor fan motor
Speed(hi/mi/lo) r/min
a.Number of rows
b.Tube pitch(a)x row pitch(b) mm
c.Fin spacing mm
d.Fin type (code)
e.Tube outside dia.and type mm
f.Coil length x height x width mm
Indoor coil
g.Number of circuits
Indoor air flow (Hi/Mi/Lo) m3/h
Indoor noise level (Hi/Mi/Lo) dB(A)
Dimension (W*H*D) mm
Packing (W*H*D) mm
Liquid side/ Gas side mm
Indoor unit
Net/Gross weight kg
MSHI-09HRIN1 MSHI-12HRIN1
1Ph,220-240V~,50Hz 1Ph,220-240V~,50Hz
9000 12000
38 42
0.16 0.2
11000 14000
39.5 42
0.16 0.2
RPG13H RPG20D
WEILING WEILING
36 38
1.2 1.5
1200/950/850 1250/1000/800
2 2
21×13.37 21×13.37
1.3 1.3
Hydrophilic aluminium Hydrophilic aluminium
φ7, innergroove tube φ7, innergroove
tube
578X252X26.74 635×315×27.34
2 2
500/460/410 680/520/420
36/34/32 39/33/28
750*250*205 815*280*215
830*285*336 915*290*360
Ф6.35/Ф9.53 Ф6.35/Ф12.7
8.5/10 10/12
HS-9U2IM_HOS-18U2IM
HS-9U11IM_HS-12U11IM_
HOS-21U11IM
www.enindel.com

-3-
Service manual
2.2 Outdoor unit
Outdoor Model M2OA-18HRDN1
Indoor Units Combination Single Double
Power supply Ph-V-Hz 1Ph,220-240V~,50Hz
Capacity Btu/h 700012000 18000
Capacity W  5275
Input W 1000~1300 1644
Rated current A 4.6~6.0 8.5
EER Btu/w.h  10.95
Cooling
EER w/w  3.21
Capacity Btu/h 10000~14000 21000
Capacity W 6155
Input W 1150~1450 1866
Rated current A 5.3~6.7 9.0
EER Btu/w.h  11.2
Heating
EER w/w  3.30
Energy Classification A
Max. input consumption W 3100
Max.current A 16
Model JU1015D1
Type Rotary inverter
Brand HITACH
Capacity Btu/h 16000(60Hz)
Input W 1650
Rated current(RLA) A 9.7
Locked rotor Amp(LRA) A 28
Compressor
Thermal protector Internal
HOS-18U2IM AND HOS-21U11IM
Refrigerant oil ml HAF68D1 480 ml
Model YDK53-6M
Brand Welling
Input W 148
Capacitor uF 3.0
Outdoor fan motor
Speed r/min 775
a.Number of rows 1.5
b.Tube pitch(a)x row pitch(b) mm 25.4×22
c.Finspacing mm 1.7
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm φ9.53 innergroove trube
f.Coil length x height x width mm 776×660×22
Outdoor coil
g.Number of circuits 2
Outdoor air flow m3/h 2500
Outdoor noise level dB(A) 55
www.enindel.com

-4-
Service manual
Dimension(W*H*D) mm 845X695X335
Packing (W*H*D) mm 975X772X405
Outdoor unit
Net/Gross weight Kg 68/72
Refrigerant type R410A g 2150
Design pressure(Hi/Lo) MPa 4.2/2.5
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф9.53
Transfer Connector(9.53 ė
12.7) mm(inch) 2
Max. refrigerant pipe length m 15 15
Refrigerant piping
Max. difference in level m 10 10
Connection wiring
Plug type
Thermostat type
Operation temp ć
Ambienttemp ć
Qty’per 20’ /40’ /40'HQ set
Electronic control
17-30
17~43(cooling); -7~21(heating)
/
/ /
Notes:
1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB;
Outdoor temp: 35°CDB;
Equivalent ref. Piping: 8m(horizontal)
2. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB;
Outdoor temp: 7°CDB, 6°CWB;
Equivalent ref. Piping: 8m(horizontal)
3. Actual noise level may differ, depending on the room structure, etc, since these noise values are
from an anechoic room.
www.enindel.com

-5-
Service manual
3 Dimensions
3.1 Alfa Series
a) Indoor unit 7/9K
b) Indoor Unit 12K
www.enindel.com

-6-
Service manual
3.2 Outdoor unit
www.enindel.com

-7-
Service manual
4 Refrigeration Cycle Diagram
4.2 Refrigeration circuit drawing of inverter binary type
heat
exchanger
heat
exchanger
outdoor unit
low-pressure
switch 2
inverter compressor
discharge
sensor
oil separator
high-pressure
switch 1
filter capillary
low-pressure oil tank
4-way
valve
down
part
up
part
condenser
capillary
capillary


filter
filter
5 Operation Limits
Indoor temperature 17ć32ć
Cooling mode Outdoor temperature 10ć50ć
Indoor temperature <=30
Heating mode Outdoor temperature -15ć33ć
Indoor temperature 10ć32ć
Dry mode Outdoor temperature 0ć50ć
6. Indoor units combination
6.1 Indoor unit combination for M2OA-18HRDN1
One unit Two unit
7 7+7 9+9
9 7+9 9+12
12 7+12
Instruction:
The total indoor units nominal capacity should not exceed 5.8kw for M2OA-18HRDN1;
HOS-18U2IM AND HOS-21U11IM
www.enindel.com

-8-
Service manual
7. Wiring Diagram
7.1 Indoor unit (7k/9k/12k)
,1'225)$102725
/289(502725
1
&1 &1 
&1
  
&1
&1
&1
&1
&1


/16
/<*
%/ $& .
5( '
:+,7(
5( '
&1
&1
287'22581,7
0$,1%2$5'


&1
&1  


0,&526:,7&+


6
<( // 2:
75$16)250(5
-;
52207(036(1625
3,3(7(036(1625
3/$60$
',63/$<%2$5'
&1 
$872 5(67$5 7
&+2,&( 
&1 
www.enindel.com

-9-
Service manual
7.2 Outdoor unit M2OA-18HRDN1
HOS-18U2IM AND HOS-21U11IM
www.enindel.com

-10-
Service manual
8 Electronic control function
8.1 Electric Control working environment.
8.1.1 Input voltage: 175~253V.
8.1.2 Input power frequency:50Hz.
8.1.3 Indoor fan normal working amp. is less than 1A.
8.1.4 Outdoor fan. Normal working amp. is less than 1.5A.
8.1.5 Four-way valve normal working amp. is less than 1A.
8.1.6 Swing motor: DC12V.
8.2 Indoor unit’s display board
122 3456
Infrared Signal
Receiver
8.2.1 AUTO indicator
This indicator illuminates when the air conditioner is in AUTO operation.
8.2.2 TIMER indicator
This indicator illuminates when TIMER is set ON/OFF.
8.2.3 PRE.-DEF. Indicator (For Cooling & Heating models only)
This indicator illuminates when the air conditioner starts defrosting automatically or
when the warm air control feature is activated in heating mode.
8.2.4 TEMPERATURE indicator
a) Usually it displays the temperature settings. When change the setting temperature,
this indicator begins to flash, and stops 20 seconds later.
b) It displays the room temperature when the air conditioner is in FAN only operation.
c) When the unit stops operation, it returns to original factory settings.
d) Displays the malfunction code or protection code.
8.2.5 OPERATION indicator
This indicator flashes after power is on and illuminates when the unit is in operation.
8.2.6 SLEEP indicator
This indicator appears when the unit is in Energy-saving operation.
8.3 Digital display in outdoor PCB
There is a digital display tube in outdoor PCB.
8.3.1 Digital display tube display function
xIn standby , The LED displays “ˉˉ”,
xIn compressor operation, the LED display the frequency,
xIn defrosting mode, The LED displays “dF”
www.enindel.com

-11-
Service manual
xIn compressor pre-heating, The LED displays “1 1”
xIn protection or malfunction, the LEC displays error code or protection code.
8.4 Outdoor unit point check function
There is a check switch in outdoor PCB.
Push the switch SW1 to check the states of unit when the unit is running. The digital display
tube will display the follow procedure when push SW1 each time:
Frequency of compressor →Running mode →Capacity demand→Number of indoor unit
→Outdoor temp. →outdoor pipe temp. →current of outdoor unit →No. 1 opening degree
of electronic expansion valve →No. 2 opening degree of electronic expansion valve →
No. 3 opening degree of electronic expansion valve →Frequency of compressor
8.4.1 Frequency of compressor:
Display Frequency of compressor
(Hz)
30 30
-- Stand by
60 60
8.4.2 Running mode:
Display Corresponding mode
0 Off
1 Cooling mode
2 Heating mode
8.4.3 Capacity demand:
Cooling mode
Capacity 2000-
2500
2000-
2500
3000-
3800
4500-
5000
5000-
5500
5500-
6100
6100-
7000
7000-
7500
7500-
8000
7500-
8000
Correspon
ding Code
1 2 3 4 5 6 7 8 9 >=10
Heating mode
Capacity 2000-
2500
2000-
2500
3000-
3800
4500-
5000
5500-
6100
6100-
7000
6100-
7000
7000-
7500
7500-
8000
8000-
8900
Correspond
ing Code
1 2 3 4 5 6 7 8 9-10 >=11
Note:
The capacity is just for reference.
8.4.4Number of indoor unit
Display Number of indoor unit
1 1
2 2
3 3
www.enindel.com

-12-
Service manual
8.4.5Outdoor ambient temp:
Display Corresponding temp. Display Corresponding
temp. Display Corresponding
temp.
15 -7.5 50 10 80 25
16 -7 51 10.5 81 25.5
17 -6.5 52 11 82 26
18 -6 53 11.5 83 26.5
19 -5.5 53 11.5 84 27
20 -5 54 12 85 27.5
21 -4.5 55 12.5 86 28
22 -4 56 13 87 28.5
23 -3.5 57 13.5 88 29
24 -3 58 14 89 29.5
26 -2 59 14.5 90 30
27 -1.5 60 15 91 30.5
28 -1 61 15.5 92 31
29 -0.5 62 16 93 31.5
30 0 63 16.5 93 31.5
31 0.5 63 16.5 94 32
32 1 64 17 95 32.5
33 1.5 65 17.5 96 33
34 2 65 17.5 97 33.5
35 2.5 66 18 98 34
36 3 67 18.5 99 34.5
37 3.5 68 19 10.35~40
38 4 69 19.5 11.40~45
39 4.5 70 20 12.45~50
40 5 71 20.5 13.50~55
41 5.5 72 21 14.55~60
42 6 73 21.5 15.60~65
43 6.5 74 22 16.65~70
44 7 75 22.5
45 7.5 75 22.5
46 8 76 23
47 8.5 77 23.5
48 9 78 24
49 9.5 79 24.5
8.4.6 Outdoor pipe temp.
Refers to 8.3.5
www.enindel.com

-13-
Service manual
8.4.7Current of outdoor unit
Display Corresponding mode
44 6.0 A
46 6.2 A
54 7.4 A
55 7.6 A
58 7.6 A
62 8.0 A
66 8.6 A
67 8.8 A
68 9.0 A
70 9.2 A
72 9.5 A
76 10.0 A
78 10.2 A
80 10.4 A
82 10.6 A
84 11.0 A
88 11.6 A
92 12.0 A
94 12.2 A
8.4.8 No. 1 opening degree of electronic expansion valve:
Opening degree equals the display data times 8
8.4.9No. 2 opening degree of electronic expansion valve:
Opening degree equals the display data times 8
8.4.10No. 3 opening degree of electronic expansion valve:
Opening degree equals the display data times 8
8.5 Protection
8.5.1 3 minutes delay at restart for compressor.
8.5.2 Discharge temperature protection of compressor, compressor stops when the temp.
of discharge is more than 115ćand last out 5 s. compressor runs when the temp. of
discharge is less than 90ć.
8.5.3 Temperature protection of compressor top, compressor stops when the temp. of top of
compressor is more than 120ć, compressor runs when the temp. of top of compressor is
less than 105ć.
8.5.4When AC voltage t265V for 30 seconds, Outdoor Unit stops operation and alarms.
When AC voltage d265V for 30 seconds, Outdoor Unit resumes operation.
8.3.5Inverter module Protection , Inverter module Protection itself has a protection function
against current, voltage and temperature.
8.5.6Sensor protection at open circuit and breaking disconnection
8.5.7 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High
Fan+300RPM)or too low(lower than 400RPM), the unit stops and LED displays failure
www.enindel.com

-14-
Service manual
information and can’t return to normal operation automatically.
8.5.8Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit
stops and LED displays failure information and can’t return to normal operation
automatically.
8.5.9Current protection: When the current is more than 16A, the compressor stops.
8.5.10Outdoor condenser high temperature protection: Under cooling mode, if T3>65 forć
3 minutes, the compressor will stop. When T3<52 , the protection is not valid.ć
8.5.11Outdoor low temperature protection: If the outdoor temperature is lower than -15ć
for 1 hour, the compressor and fan motor will stop. If the outdoor temperature is higher than
-12ćfor 10 minutes and the compressor stops operation for 1h, or the outdoor
temperature is higher than 5ćfor 10 minutes, then restart and enter into the prior operation
mode.
8.5.12Compressor pre-heating function: When the outdoor temperature is lower than 3ć
and the compressor stops operation for more than 3 hours, or the outdoor temperature is
lower than 3ćand the power is just put on, the compressor enters into pre-heating
condition. When outdoor temp. is more than 5ćor user operate it, pre-heating condition
will finish.
8. 6 Fan-only mode
Fan speed is high/mid/low/ Auto
8.7 Cooling mode
8.7.1 Indoor fan keeps running, fan speed can be set in high/mid/low/ Auto:
8.7.2Auto fan at cooling mode: (T=Indoor Temp.-Setting Temp.)
Condition Indoor fan speed
T<1.5ćLow
1.5ć<T<4ćMid.
Room temp. up
T>4ćHigh
T> 3ćHigh
1 <T<3ćć Mid.
Room temp. down
T<1ćLow
8.7.3Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
T< 4ćOff
T > 8ćOn
8.8 Dehumidifying mode
8.8.1the indoor fan is fixed in low speed
8.8.2Low room temperature protection:
When room temperature decreases to below 10ć, indoor fan stop, when room
temperature restores to over 12ć, indoor fan start.
8.8.3At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the
same as that of cooling mode.
8.9Heating mode
8.9.1Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but
www.enindel.com

-15-
Service manual
20
Anti-cold wind function prevails.
Anti-cold wind control function at heating mode
Condition
T= Indoor exchanger
temp.
Indoor fan speed
T<34ćOff
34ć<T<37ćBreeze
37ć<T<44ćLow speed
Indoor exchanger temp.
up
T> 44ćSetting fan speed
T> 38ćSetting fan speed
33ć<T<38ćLow speed
24ć<T<33ćBreeze
Indoor exchanger temp.
down
T<24ćOff
8.9.2Auto wind at heating mode
Condition
T=Indoor Temp.-Setting
Temp.
Indoor fan speed
T<1.5ćHigh
1.5ć<T<2.5ćMid.
Room temp. up
T>2.5ćLow
T<1.0ćHigh
1.0ć<T<2.0ćMid.
Room temp. down
T>2.0ćLow
8.9.3Indoor evaporator high-temperature protection at heating mode
Condition
T= Indoor exchanger temp.
Compressor
T<48ćOn
53ć<T<63ćDecrease frequency of compressor
T>63ćOff
Defrosting operation (Available for heating only).
8.10 Defrost
8.10.1Defrosting condition:
The temperature of outdoor heat exchanger remains consecutively lower than -2°c
for more than 40 minutes,
8.10.2Ending condition of defrosting
If one of following conditions is satisfied, end the defrost and turn into heating mode:
a. The defrost time has reached to 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to 15°C
8.10.3Defrosting Actions:
a. Compressor runs.
b. 4 way valve switches off,
c. Outdoor fan switches off
www.enindel.com

-16-
Service manual
d. Indoor fan running according to anti-cold wind function in heating mode.
8.11Automatic operation mode
The air conditioner automatically selects one of the following operation modes:
cooling, heating or fan only according to the temp. difference between room temp.
(TA) and set temp. (TS).
TA—TS Operation mode
TA—TS>2ćCooling
-1 ≤TAć-TS≤+2ćFan-only
TA-TS<-1ćHeating (air-only for cooling only type)
8.12Manual switch
8.12.1Mode changes when push this button .
Cooing modeÆAuto modeÆUnit offÆCooing mode
8.12.2At Cooing mode, after 30 minutes cooling operation whose fan speed is set as low,
the A/C operates with a setting temp. of 24ć.
8.12.3At auto mode, the A/C operates with a set temp. of 24ć
8.13Timer Function
8.13.1The maximum length of timer is 24 hours and the minimum resolving power is 15
minutes.
8.13.2Timer on: first turn off the A/C, the A/C will be automatically on at the set time.
8.13.3Timer off: first turn on the A/C, the A/C will be automatically off at the set time
8.13.4Timer on/off function( on time is earlier than off time): first turn off the A/C, it will be
automatically on at set time, and later be off at the set time, then unit turns on at set time.
8.13.5Timer off/on function( off time is earlier than on time): first turn on the A/C, it will be
automatically off at set time, and later be on at the set time, then unit turns off at set time.
8.14Sleep mode
8.14.1It is available at cooling, heating or auto mode.
8.14.2 Cooling:
The set temperature rise 1ćper hour. Two hours later, the set temperature will
maintain as a constant and the fan speed is kept at low speed.
8.14.3 Heating:
The set temperature decrease 1ćper hour. Two hours later, the set temperature
will maintain as a constant and the air circulation is kept at low speed (Cold air
proof function takes precedence over all).
8.14.4 Auto:
The Sleep Mode running function operates in accordance with selected running mode by
auto mode.
8.14.5 After 7 hours, unit cancels this mode automatically.
8.14.6 Auto restart function
J2 On On Off Off
J3 On Off On Off
Stop time 7 hours 8 hours 6 hours 7 hours
www.enindel.com

-17-
Service manual
In case of a sudden power failure, this function automatically sets the unit to
previous settings before the power failure when power returns.
8.15 Plasma
Plasma turns on when the indoor fan runs.
Plasma turns off automatically when front panel is opened.
8.16 Mode conflict
The indoor units can not work cooling mode and heating at same time.
Heating mode has a priority.
8.16.1Definition
Cooling mode Heating Mode Fan Off
Cooling mode No Yes No No
Heating Mode Yes No Yes No
Fan No Yes No No
Off No No No No
No: No mode conflict;
Yes: Mode conflict
8.16.2 Unit action
xIn case of one Indoor unit working in cooling mode or fan mode, and another indoor unit
is set to heating mode, the indoor unit working in cooling mode or fan mode will
change to stand by. The outdoor unit will work in heating mode.
xIn case of one Indoor unit working in heating mode, and another indoor unit is set to
cooling mode or fan mode, the indoor unit setting to cooling mode or fan mode will
change to stand by.
9.Troubleshooting
9.1 Safety
Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down
the power supply, electricity power still are kept in capacitors, do not forget to discharge the
electricity power in capacitor.
The value of resistance is about 1500 ohms to 2000 ohms
www.enindel.com