Heat Controller Energy Knight B/A-HMC30AS User manual

Wall Mounted
Mini-Split System
HMC30AS-1/HMH30AS-1/ HMC30BS-1 Single-Zone
Air Conditioning/Heat Pump
Model : B/A-HMC30AS, B/A-HMH30AS
B/A-HMC30BS
Service Manual
CAUTION
Beforeservicingtheunit,readthe
"safetyprecautions"inthismanual.
Onlyforauthorizedservicepersonne.
HEAT CONTROLLER, INC.

- 2 -
Contents
Functions.................................................................................................................................3
Product Specifications ..........................................................................................................5
Dimensions..............................................................................................................................7
Refrigeration Cycle Diagram..................................................................................................9
Pipe Length and the Elevation.............................................................................................10
Wiring Diagram......................................................................................................................11
Operation Details ..................................................................................................................13
Display Function ...................................................................................................................25
Self-diagnosis Function........................................................................................................25
Installation .............................................................................................................................26
Operation ...............................................................................................................................42
Disassembly of the parts (Indoor Unit)...............................................................................44
3-way Valve............................................................................................................................52
Cycle Troubleshooting Guide...............................................................................................57
Electronic Parts Troubleshooting Guide.............................................................................58
Electronic Control Device.....................................................................................................64
Schematic Diagram...............................................................................................................67
Exploded View and Replacement Parts List.......................................................................70

- 3 -
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Healthy Dehumidification Mode
Sleep Mode Auto Control
Auto Air Control by the unit electronic control
Chaos Swing
Defrost control(Heating)
Hot-start Control (Heating)
• Room temperature sensor (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low and Auto
• Intermittent operation of fan at low speed
• Both the indoor and outdoor fan stops
during defrosting.
•Hot start will be operated after
defrosting ends.
• The indoor fan stops until the
indoor pipe temperature will be
reached at 28°C(82°F).
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation.
• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing up
and down automatically.
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Defrost Mode or Hot Start Mode (only Heating Model)
--- Lights up during compressor running (only Cooling Model)
OUT
DOOR

- 4 -
Healthy Dehumidification Operation Mode. ( )
Remote Controller
Operation ON/OFF
Reset
Operation Mode Selection
Temperature Setting
Timer Selection
Timer Setting
JET COOL
Timer Cancel
Sleep Operation
Airflow Direction Control
(Cooling
model only) (Heating
model only)
TEMPERATURE LOW HIGH
Cooling Operation Mode.( ) Heating Operation Mode.( ) Auto Operation Mode.( )
Fan Operation Mode
Horizontal Airflow Direction Control Button(Option)
Room, Temperature Display
Setting the Time or Timer
ON OFF
SET
CANCEL
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
: (High:39°C, 102°F Low:11°C, 52°F)
: OFF, ON, OFF ON
: Cancel Sleep Mode, Timer ON or Timer OFF
: 1, 2, 3, 4, 5, 6, 7, Off Timer
: Fan Operates without cooling or heating.
Cooling Down to 18°C(65°F)
Up to 30°C(86°F) Heating Down to 16°C(61°F) Up to 30°C(86°F)

- 5 -
Product Specifications(Cooling Only)
* Design and Specifications subject to change without prior notice for product improvement.
Items Unit B/A- HMC30AS, B/A-HMC30BS
Power Supply ø, V, Hz 1, 208/230, 60
Cooling Capacity BTU/h 27,000/28,000
Input W 3,450/3,600
Running Current A 16.5/16.0
COMP. Locked Rotor AMP. A A: 68. B: 29
E.E.R BTU/hW 7.79/7.81
Air Circulation m3/min(cfm) 21(740)
Moisture Removal l/h(pts/hr) 3.7(7.8)
Noise Level Indoor, High dB(A) 49
(Sound Med dB(A) 46
Pressure, 1m) Low dB(A) 43
Outdoor, Max dB(A) 63
Features Temperature Control Thermistor
Air Deflection 4-way
Steps, Fan/Cool 3/3
Airflow Direction Control(up&down) Auto
Airflow Direction Control(left&right) Manual
Remocon Type Wireless LCD
Setting Temperature Range, Cooling Mode 64~86°F
Temperature Increment 2°F
Auto Operation(electronic control) Yes
Self Diagnosis Yes
Timer 24hr, On/Of
Sleep Operation Yes
Healthy Dehumidification Mode Yes
Restart Delay minutes 3
Refrigerant(R-22) Charge g(oz) 2300(81)
Power cord AWG #: P*mm212:3*2.5
Fuse or breaker Capacity A 30A
Connecting Cable AWG #: P*mm220:4*0.75
Connecting Tube Liquid Side mm(in) 9.52(1/4)
(ø. Socket Flare) Gas Side mm(in) 15.88(1/2)
Length, std m(ft) 7.5(24.6)
Additional Drain Hose(Outer Dia.) mm(in) 15.5(5/8)
Dimensions Indoor mm 1259*349*205
(WxHxD) in 49.6*13.7*8.1
Outdoor mm 870*800*320
in 34.3*31.5*12.6
Net Weight Indoor kg(lbs) 20(44.2)
Outdoor kg(lbs) 20(44.2)

- 6 -
Product Specifications(Cooling & Heating)
Items Unit B/A-HMH30AS
Power Supply ø, V, Hz 1, 208/230, 60
Cooling Capacity BTU/h 27,000/28,000
Heating Capacity BTU/h 28,000/29,000
Input Cooling W 3,450/3,600
Heating W 3,550/3,750
Running Current Cooling A 16.5/16.0
Heating A 16.5/17.0
COMP. Locked Cooling A A: 68, B: 29
Rotor AMP. Heating A A: 68. B: 29
E.E.R BTU/hW 7.82/7.78
C.O.P 2.30/2.26
Air Circulation m3/min(cfm) 21(740)
Moisture Removal l/h(pts/hr) 3.7(7.8)
Noise Level Indoor, High dB(A) 49
(Sound Med dB(A) 46
Pressure, 1m) Low dB(A) 43
Outdoor, Max dB(A) 63
Features Temperature Control Thermistor
Air Deflection 4-way
Steps, Fan/Cool/Heat 3/3/3
Airflow Direction Control(up&down) Auto
Airflow Direction Control(left&right) Manual
Remocon Type Wireless LCD
Setting Temperature Range, Cooling Mode
64~86°F
Heating Mode 60~86°F
Temperature Increment 2°F
Auto Operation(electronic control) Yes
Self Diagnosis Yes
Timer 24hr, On/Off
Sleep Operation Yes
Healthy Dehumidification Mode Yes
Restart Delay minutes 3
Defrost Control Yes
Hot Start Yes
Refrigerant(R-22) Charge g(oz) 2550(89.9)
Power cord AWG #: P*mm212:3*2.5
Fuse or breaker Capacity A 30A
Connecting Cable AWG #: P*mm220:4*0.82
Connecting Tube Liquid Side mm(in) 9.52(3/8)
(ø. Socket Flare) Gas Side mm(in) 15.88(5/8)
Length, std m(ft) 7.5(24.6)
Additional Drain Hose(Outer Dia.) mm(in) 15.5(5/8)
Dimensions Indoor mm 1259*349*205
(WxHxD) in 49.6*13.7*8.1
Outdoor mm 870*800*320
in 34.3*31.5*12.6
Net Weight Indoor kg(lbs) 20(44.2)
Outdoor kg(lbs) 33(72.8) 20(44.2)
* Design and Specifications subject to change without prior notice for product improvement.

(1) Indoor Unit
- 7 -
Dimensions
W
H
Tubing hole cover
Tubing hole cover
Installation plate
D
Wmm(inch) 1,259(49.6)
Hmm(inch) 349(13.7)
Dmm(inch) 205(8.1)
Model
Dimension
30K SERIES

- 8 -
MODEL
DIM
- 8 -
W
L7 L6 L8 L9
D
L1
L2
L3
L10L11
L4L5
H
Gas side
3-way valve
Liquid side
3-way valve
W mm(in ch) 870(34.3)
H mm(in ch) 800(31.5)
D mm(in ch) 320(12.6)
L1 mm(in ch) 370(14.6)
L2 mm(in ch) 340(13.4)
L3 mm(in ch) 25(1.0)
L4 mm(in ch) 775(30.5)
L5 mm(in ch) 25(1.0)
L6 mm(in ch) 546(21.5)
L7 mm(in ch) 162(6.4)
L8 mm(in ch) 162(6.4)
L9 mm(in ch) 54(2.1)
L10 mm(in ch) 74.5(2.9)
L11 mm(in ch) 79(3.1)
30K SERIES
(2) Outdoor Unit

- 9 -
Refrigeration Cycle Diagram
INDOOR UNIT OUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(CONDENSER)
HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
COMPRESSOR
ACCUMU
LATOR
Suction Line
Suction Line
3-WAY VALVE
Evaporator Line
Evaporator Line
3-WAY VALVE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
(Heating Model only)
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)
(1) Cooling Only Models
(2) Cooling & Heating Models

- 10 -
Pipe length and the elevation
* Capicity is based on standard length and maximum allowance length is the basis of
reliability.
* Oil trap should be installed per 5~7 meters(16.4~23.0ft).
CAUTION
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit B
In case more than 5m (16.4ft)
30k 5/8"(15.88mm) 3/8"(9.52mm) 7.5(25) 15(50) 30(100) 30(0.32)
(50Hz, 60Hz)
Pipe Size
Capacity
(Btu/h) GAS LIQUID
Additional
Refrigerant
g/m(oz/ft)
Max.
Length
A m(ft)
Max.
Elevation
B m(ft)
Standard
Length
m(ft)

- 11 -
Wiring Diagram
(1) Indoor Unit (Cooling Only Models, & Heating Models)
MOTOR
SH-CAPA.
YL
PILLAR
TERMINAL
AUTO RESTART FORCED OPERATION
CN-DISP
CN-L/R CN-U/D CN-TH
THERMISTOR
STEP
MOTOR
(UP/DOWN)
STEP
MOTOR
(L/R)
H.V.B ASM
LIMITS S/W
Negative ion
OPTION
STEP
MOTOR
(L/R)
CN-L/R
DISPLAY PCB ASM
3854A20065D
TO OUTDOOR UNIT
BL
3(L1) 4(L2)
5
BR
GN/YL
BL RD RD BR
GN/YL
BR
FUSE
AC250V/T2A
TRIAC
OR
BK
ZNR
CN-POWER
CN-MOTOR
WIRING DIAGRAM

- 12 -
(2) Outdoor Unit
• Cooling Only Models
• Heating Models
TO INDOOR
UNIT POWER
INPUT
FMo
T/B
REVERSING
VALVE
Comp(B)
OLP
CAPACITOR(B) CAPACITOR(A)
CC
SS
RR
Comp(A)
5RD
BL
BR
BK
YL
YL BR BL BK
RD
RD
BL
BK
BK
BK
BK
OR
OR
GN/YL
BL
BR
FUSE
(250V,5A)
FUSE
(250V,5A)
FUSE(250V,3A)
CN-POWER
CN-FAN
CN-CON
CN-COMP
H
HC CF
CN-LEV
CN-TH2
CN-4WAY
PIPE-IN
PIPE-OUT
TEMP-IN
COIL EXPANSION
RY-HI
RY-COMP(B) RY-COMP(A)
3(L1)
2(L2)
4(L2)
1(L1)
MAIN
PCB ASM
3854A20153X
WIRING DIAGRAM
TO INDOOR
UNIT POWER
INPUT
FMo
T/B
Comp(B)
OLP
CAPACITOR(B) CAPACITOR(A)
CC
SS
RR
Comp(A)
5
RD
BL
BR
BK
YL
YL BR BL BK
RD
RD
BL
BK
BK
BK
OR
OR
GN/YL
BL
BR
FUSE
(250V,5A)
FUSE
(250V,5A)
FUSE(250V,3A)
CN-POWER
CN-FAN
CN-CON
CN-COMP
H
HC CF
CN-LEV
CN-TH2
PIPE-IN
TEMP-IN
COIL EXPANSION
RY-HI
RY-COMP(B) RY-COMP(A)
3(L1)
2(L2)
4(L2)
1(L1)
MAIN
PCB ASM
3854A20153W
WIRING DIAGRAM

- 13 -
(1) The function of main control
1. Time delay Safety Control
•3min.; The compressor operation is delayed for 3 minutes to balance the pressure of cycle.
(Protection of compressor)
•5sec.; The indoor fan is delayed for 5 seconds, when operating initially, to prevent noises occurred by the vertical
louver and wind.
•2min.; The reversing valve is delayed for 2 minutes to prevent the refrigerant-gas for abnormal noise when the
heating operation is OFF or switched to the other operation mode while compressor is off.
While compressor is running, it takes 3~5 seconds to switch.
2. Chaos Swing Mode
•By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are
fixed to the desired direction.
•While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
Operation Details
CLOSED
OPEN
< Cooling Mode >
8°
CLOSED
OPEN
< Heating Mode >
8°

- 14 -
3. Cooling Operation Mode –1st Stage
1) Initial start & indoor load decision stage
This stage is to decide load level of indoor and select operation compressor, which is operated according to
Table 1.
After initial start, 2nd and 3rd operating time of compressor are saved, for the purpose of selecting following
operation stage with the average value of before operated time.
- Using the average value(tm) of tm1 & tm2 and difference of outdoor temp. & desired temp., following(next)
operation stage of compressor is selected under the table 1.
- But, compressor would be restarted after 3 mins. of suspension, if it turns off.
2) If 100% compressor is selected, cooling operation-1st stage would be working.
3) If 40% compressor is selected, cooling operation-2nd stage would be working.
4) Operation Diagram
tm=(tm1+tm2)/2
Room Temp.
Desired Temp.
Desired Temp.+0.5°C
Desired Temp.-1.0°C
Desired Temp.-0.5°C
Comp 60 %
40 %
Outdoor Fan
Indoor Fan Controlled at the Indoor Unit
ON
ON OFF OFF ON ON OFF OFF ON ON
MAX. OFF MAX. OFF MAX.
over 3 mins. over 3 mins.
tm1 tm2

- 15 -
< Table 1 : Selecting Operation Compressor by tm >
Outdoor Temp.
- Desired Temp.
1tm <= 250
40 %
2tm =< 250
40 %
3tm =< 250
40 %
4tm =< 250
40 %
5tm =< 250
40 %
6tm =< 290
40 %
7tm =< 320
40 %
8tm =< 360
40 %
9tm =< 400
40 %
10 tm =< 430
40 %
11 tm =< 470
40 %
12 tm =< 510
40 %
13 tm =< 540
100%
tm Scale
Selected Compressor
tm > 250
100 %
tm > 250
100 %
tm > 250
100 %
tm > 250
100 %
tm > 250
100 %
tm > 290
100 %
tm > 320
100 %
tm > 360
100 %
tm > 400
100 %
tm > 430
100 %
tm > 470
100 %
tm > 510
100 %
tm > 540
100 %
Selected Compressor
tm Scale
Unit : Sec.

- 16 -
4. Cooling Operation - 2nd Stage
1) Condition to decide operation stage
- If Room Temp. reaches at [Desired Temp. + 0.5°C] for 2 consecutive mins. after suspension of 60% compressor operation
(<°C 3, , >), [Required time to restart 60% compressor] would be examined.
60% compressor would be restarted when [Required time to restart 60% compressor] is passed (<°C 3, >)..
The current condition would be maintained when it reaches at [Required time to restart 60% compressor], if [Required
time to restart 60% compressor] is not passed (<°C 3, >).
2) Condition to shift operation stage
1] It shifts to the Cooling Operation- 1st Stage when the operation such as of 1) is repeated in a series of 2 times.
2] 40% compressor operation would be suspended when the Room Temp. goes down to [Desired temp. –1.0°C] after stop-
ping 60% compressor operation (<°C 3, >).
It shifts to the Cooling Operation-3rd Stage when the 40% compressor operation is suspended in a series of 2 times by
falling of room temperature after stopping 60% compressor operation.
3] It starts 60% compressor operation immediately and returns to the initial stage of Cooling Operation-2nd
Stage when the single operation time of 40% compressor pass more than 1 hour.
3) Operation Diagram
Room Temp.
Desired Temp.
Desired Temp.+0.5°C
Desired Temp.-1.0°C
Desired Temp.-0.5°C
Comp 60 %
40 %
Outdoor Fan
Indoor Fan
OFF
OFF OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON ON
ON OFF
ON
Off
Off
MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. Off
bc
a
ON
ON
MAX.
ON
ON
MAX.
6 mins. 6 mins. 6 mins.
100 %
40 %
0 %
Comp
3 mins
Controlled at the Indoor Unit

- 17 -
5. Cooling Operation - 3rd Stage
1) This operation works when the indoor load is small. The single operation of 40% compressor is performed as follows.
- The single operation of 40% compressor works when the Room Temp. reaches at [Desired Temp. + 0.5 °C].
- 40% compressor operation stops when the Room Temp. reaches at [Desired Temp. - 0.5 °C].
(But, the compressor can restart after 3 mins of compressor's off.)
2) Condition to shift operation stage
- It operates the Cooling Operation -2nd Stage when the desired temp. goes to "Desired Temp +1.0°C" more than 3 mins.
during its operation.
- It shifts to 100-40% operation after standby until 40% operation goes OFF, if the single operation of 40% compressor works
more than 1 hour.
3) Operation Diagram
Room Temp.
Desired Temp.
Desired Temp.+0.5
Desired Temp.-0.5
Comp 60 %
40 %
Outdoor Fan
Indoor Fan
Controlled at the Indoor Unit
Room Temp.
OFF
OFF
OFF
OFF
ON
MIN.
OFF
OFF
OFF
3mins. 3 mins.
OFF
OFF
OFF
OFF
ON
MIN.

- 18 -
6. Heating Operation - 1st Stage
1) Operation Condition : This stage means the 1st elapsed time which the room temperature reaches around at the desired
temperature after starting the heating operation.
- 60% & 40% compressor operations would be operated until the room temperature reaches at [Desired Temp. +0.5°C].
In other words, 100% operation would be performed.
- 60% & 40% compressor operations would be all suspended when the room temperature goes to [Desired Temp. +0.5°C].
2) Condition to decide load
: This stage performs the 100% compressor On/Off 2 times.
- 100% compressor operation would be performed when 3-minutes pass after suspension of the previous stage and
the room temperature reaches at [ Desired Temp. -0.5°C].
- 60% & 40% compressor operations would be suspended when the room temperature goes to [Desired Temp. +0.5°C].
- Criteria to decide following operation stage
a. when the average time during 2 times compressor operations is more than 360 seconds,
b. when the temperature falls more than –3°C within 3 minutes after OFF of compressor,
c. when the outdoor temperature is under 7°C.
- It operates the heating operation -2nd stage if any condition among the above criteria would be satisfied.
MAX.OFF
OFF
OFF
OFF MAX
.
OFF
OFF
Controlled at the Indoor Unit
MAX.
ON
ON
60%
40%
Outdoor Fan
Indoor Fan
Desired Temp. +1.0°C
Desired Temp. -0.5
Desired Temp. +0.5
Desired Temp.
Comp
more than 3 mins. more than
3 mins.
Room Temp.
tm1 tm2
ON
ON
ON
ON

- 19 -
7. Heating Operation - 2nd Stage
1) Operation
- 100% compressor operation would be performed when 3-minutes pass after suspension of the previous stage and the room
temperature reaches at [ Desired Temp. -0.5°C].
- 60% & 40% compressor operations would be all suspended when the room temperature goes to [Desired Temp. +0.5°C].
- Criteria to shift to the following operation stage
: It shifts to the Heating Operation-3rd Stage from the Heating Operation-2nd Stage, if the operation time of compressor is
within 6 minutes and at the same time the outdoor temperature is over [Outdoor Temperature possible for 60% Operation]
whenever it checks every operation time.
2) Operation Diagram
Room Temp.
Desired Temp.
Desired Temp.+0.5°C
Desired Temp.-5.0°C
Comp. 40 %
60 %
Outdoor Fan
Indoor Fan Controlled at the Indoor Unit
Room Temp.
OFF
OFF
OFF
ON
ON
MAX.
OFF
OFF
OFF
3 mins. 3 mins.
OFF
OFF
OFF
ON
ON
MAX.
Outdoor Temp. >
7°C
6 mins. 6 mins.

- 20 -
8. Heating Operation - 3rd Stage
1) Condition to decide operation stage
a. [Restart Time of 40% compressor] should be examined, when the Room Temp. falls and stays under [ Desired Temp. -
0.5°C] over 1 minutes after suspension of 40% compressor operation.
If [Restart Time of 40% compressor] pass, 40% compressor would be restarted.
If [Restart Time of 40% compressor] doesn't pass, the current condition should be maintained until it reaches and 40%
compressor would be restarted after passing some times.
b. 60% compressor operation would be suspended when the room temperature goes to [Desired Temp. +1.0°C] after sus-
pension of 40% compressor operation.
60% & 40% compressors operations would be all suspended when the room temperature goes to [Desired Temp. +0.5°C].
c. 40% compressor would be started when the Room Temperature is maintained between [Desired Temp. +1.0°C] and
[Desired Temp. -0.5°C] more than 1 hour after suspension of 40% compressor operation.
2) Condition to shift following operation stage
: It shifts from the operation stage during load and shows condition to perform following operation stage.
a. It operates Heating Operation-1st Stage when operation such as the above ®Ë of a. in the 1) item is performed in a series
of 2 times.
b. It operates Heating Operation-4th Stage, when operation such as the above b. of 1) in a series of 2 times and the average
time in 2 times of [60% single operation] is within 3-minutes.
3) Operation Diagram
MAX.
on
off
.
MAX. MAX.
.
ON
OFF
MAX.
.
MAX. M
A
XMAX. MAX.
ON
OFF
ON
OFF
Controlled at the Indoor Unit
MAX.
OFF
OFF
Indoor Fan
60%
40%
Outdoor
Fan
Desired Temp. +1.0°C
Desired Temp. -0.5°C
Desired Temp. +0.5°C
Desired Temp.
ON ON
ON
ON
ON ON
ON
Comp.
8 mins.
8 mins.
Room Temp.
ON
8 mins.
1min
.1min