Tosot TM18H4O User manual

Service Manual
Models:
Models: TM18H4O
TM24H4O
TM30H4O
TM36H4O
TM42H3O
(Refrigerant R410A)

Service Manual
Table of Contents
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................2
3. Outline Dimension Diagram......................................................................10
4. Refrigerant System Diagram....................................................................12
5. Electrical Part.........................................................................................................14
5.1 Wiring Diagram...............................................................................................................14
5.2 PCB Printed Diagram .....................................................................................................17
6. Function and Control......................................................................................20
Part Ⅱ: Installation and Maintenance .................................................23
7. Notes for Installation and Maintenance..........................................23
8. Installation Manual............................................................................................26
8.1 Electrical Connections....................................................................................................27
8.2 Installing the Outdoor Unit..............................................................................................28
8.3 Installation Dimension Diagram......................................................................................29
8.4 Check after Installation...................................................................................................30
9. Troubleshooting ..................................................................................................31
9.1 Malfunction Indicator .....................................................................................................31
9.2 Malfunction Checking and Elimination ...........................................................................32
9.3 Maintenance Method for Normal Malfunction.................................................................38
10. Exploded View and Parts List ..............................................................40
11. Removal Procedure.......................................................................................48
Appendix:........................................................................................................................73
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................73
Appendix 2: Pipe Expanding Method ...................................................................................74
Appendix 3: List of Resistance for Temperature Sensor ......................................................75

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Outdoor Unit
TM18H4O TM24H4O
TM30H4O TM36H4O
TM42H3O
Model List:
No Model Product code
1 TM18H4O CB228W07700_L81561
2 TM24H4O CB228W07800_L81561
3 TM30H4O CB228W07900_L81561
4 TM36H4O CB228W08000_L81561
5 TM42H3O CN860W0180_L81561

2Technical Information
Service Manual
Model TM18H4O
Product Code CB228W07700_L81561
Power
supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Cooling capacity(max~min) Btu/h 18000(6155~6998)
Heating capacity(max~min) Btu/h 19000(8530~22600)
Cooling Power Input(max~min) W 1440
Heating Power Input(max~min) W 1520
Cooling Current Input A 6.26
Heating Current Input A 6.61
Rated Power Input W 2800
Rated Current A 12.42
EER (Btu/h)/W 12.5
COP (Btu/h)/W 12.5
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Refrigerant Oil Type RB68EP
Compressor Type Inverter Rotary
L.R.A A /
Compressor Rated Load Amp (RLA) A 10.82
Compressor Power Input W 1440
Compressor Thermal Protector 1NT11L-6233
Throttling Method Electron expansion valve
Cooling Operation Ambient Temperature Range OF -0.4~118.4
Heating Operation Ambient Temperature Range OF -4~75.2
Condenser Material Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ9/32
Rows-Fin Gap(mm) inch 2-1/18
Coil length (l) X height (H) X coil width (L) inch 33 1/2X1 /12X26
Fan Motor Speed (rpm) (H/M/L) rpm 630
Output of Fan Motor W 60
Fan Motor RLA A 0.62
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 1883
Fan Type-Piece Axial-ow
Fan Diameter inch Φ20 1/2
Defrosting Method Automatic Defrosting
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.3
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5
Dimension (W/H/D) inch 38X27 9/16X15 39/64
Dimension of Package (L/W/H) inch 40 13/32X18X29
Dimension of Package(L/W/H) inch 40 1/2X18X29 1/2
Net Weight lb 114.7
Gross Weight lb 124.6
efrigerant Charge R410A
Refrigerant Charge oz 56.45
2. Specications

3
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.0032
Recommended Power Cable(Core) N 3
Connection Pipe Connection Method Flare Connection
Not Additional Gas Connection Pipe Length ft 32.8
Connection Pipe Gas Additional Charge oz/ft. 0.2
Outer Diameter of Liquid Pipe1(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe2(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Gas Pipe1(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe2(LENNOX Allocation)
(Metric) inch 3/8
Connection Pipe Max. Height Distance(indoor and
indoor) ft 32.8
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 32.8
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 32.8
Max. equivalent connection pipe length(outdoor to
last indoor) ft 32.8
Connection Pipe Max. Length Distance(total lenght) ft 65.6
The above data is subject to change without notice; please refer to the nameplate of the unit.

4Technical Information
Service Manual
Model TM24H4O
Product Code CB228W07800_L81561
Power
supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Cooling capacity(max~min) Btu/h 24000(7500~33000)
Heating capacity(max~min) Btu/h 26000(7500~35000)
Cooling Power Input(max~min) W 1920
Heating Power Input(max~min) W 2050
Cooling Current Input A 8.35
Heating Current Input A 8.9
Rated Power Input W 4550
Rated Current A 20.19
EER (Btu/h)/W 12.5
COP (Btu/h)/W 12.7
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXAS-D23zX090B
Compressor Refrigerant Oil Type RB68EP
Compressor Type Inverter Rotary
L.R.A A /
Compressor Rated Load Amp (RLA) A 15.82
Compressor Power Input W 2550
Compressor Thermal Protector 1NT11L-6233
Throttling Method Electron expansion valve
Cooling Operation Ambient Temperature Range OF -0.4~118.4
Heating Operation Ambient Temperature Range OF -4~75.2
Condenser Material Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ2/7
Rows-Fin Gap(mm) inch 2-1/18
Coil length (l) X height (H) X coil width (L) inch 38 21/32X1 1/2X29 7/16
Fan Motor Speed (rpm) (H/M/L) rpm 800
Output of Fan Motor W 90
Fan Motor RLA A 0.59
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 2354
Fan Type-Piece Axial-ow
Fan Diameter inch Φ21 43/64-2 39/64
Defrosting Method Automatic Defrosting
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.3
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5
Dimension (W/H/D) inch 38 37/64X31 7/64X17 21/64
Dimension of Package (L/W/H) inch 42 1/2X19X33
Dimension of Package(L/W/H) inch 42 43/64X19 13/64X33 43/64
Net Weight lb 153.2
Gross Weight lb 164.3
efrigerant Charge R410A
Refrigerant Charge oz 77.6

5
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.0051
Recommended Power Cable(Core) N 3
Connection Pipe Connection Method - Flare Connection
Not Additional Gas Connection Pipe Length ft 98.4
Connection Pipe Gas Additional Charge oz/ft. 0.2
Outer Diameter of Liquid Pipe1(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe2(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe2(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Gas Pipe1(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe2(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe2(LENNOX Allocation)
(Metric) inch 3/8
Connection Pipe Max. Height Distance(indoor and
indoor) ft 32.8
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 32.8
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 32.8
Max. equivalent connection pipe length(outdoor to
last indoor) ft 65.6
Connection Pipe Max. Length Distance(total lenght) ft 196.8
The above data is subject to change without notice; please refer to the nameplate of the unit.

6Technical Information
Service Manual
Model TM30H4O
Product Code CB228W07900_L81561
Power
supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Cooling capacity Btu/h 28500
Heating capacity Btu/h 30000
Cooling Power Input W 2280
Heating Power Input W 2350
Cooling Current Input A 9.91
Heating Current Input A 10.22
Rated Power Input W 3800
Rated Current A 16.86
EER (Btu/h)/W 12.50
COP (Btu/h)/W 12.76
SEER 21.00
HSPF 10.50
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR CO.LTD
Compressor Model QXAS-D32zX090A
Compressor Refrigerant Oil Type RB68EP
Compressor Type Inverter Rotary
L.R.A A 30
Compressor Rated Load Amp (RLA) A 13.9
Compressor Power Input W 4150
Compressor Thermal Protector 1NT11L—6233
Throttling Method Electron expansion valve
Cooling Operation Ambient
Temperature Range
OF 0~118
Heating Operation Ambient
Temperature Range
OF -4~86
Condenser Material Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ5/16
Rows-Fin Gap(mm) inch 2-1/16
Coil length (l) X height (H) X coil
width (L) inch 27 7/16X29 7/16X12 13/64
Fan Motor Speed (rpm) (H/M/L) rpm 630
Output of Fan Motor W 60
Fan Motor RLA A /
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 2330
Fan Type-Piece Axial-ow
Fan Diameter inch Φ21 19/32-4 45/64
Defrosting Method Automatic Defrosting
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating
Pressure for the Discharge Side PSIG 550
Permissible Excessive Operating
Pressure for the Suction Side PSIG 240
Dimension (WXHXD) inch 38 27/64X31 7/64X17 21/64
Dimension of Package (LXWXH) inch 42 1/2X19X33
Dimension of Package(LXWXH) inch 42 43/64X19 13/64X33 43/64
Net Weight lb 145.5
Gross Weight lb 154.4
efrigerant Charge R410A
Refrigerant Charge oz 98.8

7
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.0062
Recommended Power Cable(Core) N 3
Connection Pipe Connection Method - Flare Connection
Not Additional Gas Connection Pipe Length ft 131.2
Connection Pipe Gas Additional Charge oz/ft. 0.2
Outer Diameter of Liquid Pipe1(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe2(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe3(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Liquid Pipe4(LENNOX Allocation)
(Metric) inch 1/4
Outer Diameter of Gas Pipe1(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe2(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe3(LENNOX Allocation)
(Metric) inch 3/8
Outer Diameter of Gas Pipe4(LENNOX Allocation)
(Metric) inch 3/8
Connection Pipe Max. Height Distance(indoor and
indoor) ft 24.6
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 49.2
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 49.2
Max. equivalent connection pipe length(outdoor to
last indoor) ft 82.0
Connection Pipe Max. Length Distance(total lenght) ft 229.7
The above data is subject to change without notice; please refer to the nameplate of the unit.

8Technical Information
Service Manual
Model TM36H4O TM42H3O
Product Code CB228W08000_L81561 CN860W0180_L81561
Power
supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Cooling capacity Btu/h 34000 36000
Heating capacity Btu/h 42500 43000
Cooling Power Input W 2800 3740
Heating Power Input W 3350 3650
Cooling Current Input A 12.5 16.5
Heating Current Input A 15 16
Rated Power Input W 3800 4000
Rated Current A 30 30
EER (Btu/h)/W 12.14 9.63
COP (Btu/h)/W 12.69 11.78
SEER 21.00 21.00
HSPF 10.20 10.20
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR
CO.LTD
ZHUHAI LANDA COMPRESSOR
CO.LTD
Compressor Model QXAS-D32zX090A QXAS-D32zX090A
Compressor Refrigerant Oil Type RB68EP
Compressor Type Inverter Rotary Inverter Rotary
L.R.A A 30 30
Compressor Rated Load Amp (RLA) A 15.6 17.8
Compressor Power Input W 4150 4150
Compressor Thermal Protector 1NT11L—6233 1NT11L—6233
Throttling Method Electron expansion valve Electron expansion valve
Cooling Operation Ambient Temperature
Range
OF 0~118 0~118
Heating Operation Ambient Temperature
Range
OF -4~86 -4~86
Condenser Material Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter inch Φ5/16 Φ5/16
Rows-Fin Gap(mm) inch 2-1/16 2-1/16
Coil length (l) X height (H) X coil width (L) inch 27 7/16X29 7/16X12 13/64 27 7/16X29 7/16X12 13/64
Fan Motor Speed (rpm) (H/M/L) rpm 850 850
Output of Fan Motor W 140 140
Fan Motor RLA A / /
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 4531 4531
Fan Type-Piece Axial-ow Axial-ow
Fan Diameter inch Φ22 13/32—5 63/65 Φ22 13/32—5 63/65
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Permissible Excessive Operating Pressure for
the Discharge Side PSIG 550 550
Permissible Excessive Operating Pressure for
the Suction Side PSIG 240 240
Dimension (W/H/D) inch 42 1/2X43 27/64X17 21/64 42 1/2X43 27/64X17 21/64
Dimension of Package (L/W/H) inch 46X18 57/64X43 57/64 46X18 57/64X43 57/64
Dimension of Package(L/W/H) inch 46 1/6X19X44 1/2 46 1/6X19X44 1/2
Net Weight lb 198.5 198.5
Gross Weight lb 216.1 216.1
efrigerant Charge R410A R410A
Refrigerant Charge oz 128.8 128.8

9
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor sq in 0.0062 0.0062
Recommended Power Cable(Core) N 3 3
Connection Pipe Connection Method - Flare Connection Flare Connection
Not Additional Gas Connection Pipe Length ft 131.2 131.2
Connection Pipe Gas Additional Charge oz/ft. 0.2 0.2
Outer Diameter of Liquid Pipe1(LENNOX Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe2(LENNOX Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe3(LENNOX Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe4(LENNOX Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Liquid Pipe4(LENNOX Allocation)
(Metric) inch 1/4 1/4
Outer Diameter of Gas Pipe1(LENNOX Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe2(LENNOX Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe3(LENNOX Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe4(LENNOX Allocation)
(Metric) inch 3/8 3/8
Outer Diameter of Gas Pipe4(LENNOX Allocation)
(Metric) inch 3/8 3/8
Connection Pipe Max. Height Distance(indoor and
indoor) ft 24.6 24.6
Connection Pipe Max. Height Distance(indoor and
outdoor and indoor up) ft 49.2 49.2
Connection Pipe Max. Height Distance(indoor and
outdoor and outdoor up) ft 49.2 49.2
Max. equivalent connection pipe length(outdoor to
last indoor) ft 82.0 82.0
Connection Pipe Max. Length Distance(total lenght) ft 246.1 246.1
The above data is subject to change without notice; please refer to the nameplate of the unit.

10 Technical Information
Service Manual
3. Outline Dimension Diagram
35 1/8
38
27 9/16
15 39/64
13 27/64
22
14 1/2
Unit:inch
Unit:inch
TM18H4O
TM24H4O
38 37/64
35 1/8 13 27/64
17 21/64
31 7/64
22
14 1/2

11
Technical Information
Service Manual
TM36H4O
TM42H3O
TM30H4O
Unit:inch
40
42 1/2
24 13/16
17 21/64
14 1/4
14 51/64
43 27/64
38 27/64
36 7/32
17 21/64
14 37/64
31
24
1523/32
Unit:inch

12 Technical Information
Service Manual
4. Refrigerant System Diagram
outdoor
indoor
D1
C1
B1
A1
filter
A heat exchanger
gas -liquid separator
inverter compressor
discharge silencer
discharge temperature
sensor
SP
4-way valve
outdoor heat exchanger
fan
high pressure switch
B heat exchanger
C heat exchanger
D heat exchanger
filter
filter
filter
filter
Note: Not available for 14K/18K
model
C2
C3
D3
D2
B3
B2
A2
A3
A1:
A－unit electronic expansion valve B1:B-unit electronic expansion valve
C1:C-unit electronic expansion valve D1:D-unit electronic expansion valve
A2:A-unit gas pipe temperature sensor B2:B-unit gas pipe temperature senso
r
C2:C-unit gas pipe temperature sensor D2:D-unit gas pipe temperature senso
r
A3:
A－unit liquid pipe temperature sensor B3:B-unit liquid pipe temperature sensor
C3:C-unit liquid pipe temperature sensor D3:D-unit liquid pipe temperature senso
r
Note: Not available for 14K/18K model

13
Technical Information
Service Manual
Schematic Diagram of Free Match Series Inverter Heat Pump System
M
Heat Exchanger
Four-way Valve
Compressor
Silencer
Gas/Liquid Separator
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heating
Cooling
Outdoor Uint
Indoor Uint
Electronic Expansion Valve
Schematic Diagram of Free Match Series Inverter Heat Pump System
The outdoor and indoor units start to work once the power is switched on. During the cooling operation,
the
low temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together
and
then is taken into the compressor to be compressed into high temperature, high pressure gas, which will
soon
go to the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into
refrigerant
liquid. After passing through the throttling device, the temperature and pressure of the refrigerant
liquid will further decrease and then go the main valve.
After that, it will be divided and go to the heat exchanger
of
each indoor unit to exchange heat with the air which needs to be conditioned. Consequently, the refrigerant
liquid
become low temperature, low pressure refrigerant gas again. Such a refrigeration cycle goes round and
round
to achieve the desired refrigeration purpose. During the heating operation, the four-way valve is involved
to
make the refrigeration cycle run reversely. The refrigerant radiates heat in the heat exchanger of the indoor
unit
(so do the electric heating devices) and absorb heat in the heat exchanger of the outdoor unit for a heat
pump heating cycle so as to achieve the desired heating purpose.
High Pressure Swicth
Filter
Eutectic Stopper

14 Technical Information
Service Manual
5. Electrical Part
5.1 Wiring Diagram
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN GREEN COMP Compressor
YE Yellow BN Brown Grouding wire
RD Red BU Blue
YEGN Yellow/Green BK Black
VT Violet OG Orange
● Outdoor Unit
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15
Technical Information
Service Manual
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TM30H4O
63624100019

16 Technical Information
Service Manual
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TM36H4O
TM42H3O
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
63624100020

17
Technical Information
Service Manual
1
1
23 45678910
11
12
13
14
15
16
1 Terminal of compressor
2Terminal of low-temperature
cooling temperature sensor
3Overload protection terminal
of compressor
4Temperature sensor terminal
of outdoor unit
5High pressure protection
terminal
6Low pressure protection
terminal
7 Terminal of outdoor unit
8Electric heating belt terminal
of chassis
9 Terminal of 4-way valve
10 Electric heating belt terminal
of compressor
11
Terminal of temperature
sensor wire for liquid valve
and gas valve
12 Terminal of electronic
expansion valve
13
Terminal of communication wire
for indoor unit and outdoor unit
14 Neutral wire terminal for
communication
15 Live wire terminal
16 Neutral wire terminal
5.2 PCB Printed Diagram
● TOP VIEW
● BOTTOM VIEW
TM18H4O

18 Technical Information
Service Manual
1234 8756 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
● TOP VIEW
● BOTTOM VIEW
TM24H4O
1 Terminal of compressor
2 Low pressure protection terminal
3 High pressure protection terminal
4Overload protection terminal of
compressor
5Temperature sensor terminal of
outdoor unit
6 Electric heating terminal of chassis
7Electric heating terminal of
compressor
8 Terminal of outdoor unit
9 Terminal of 4-way valve
10 Temperature sensor for liquid valve
and gas valve for unit A
11 Temperature sensor for liquid valve
and gas valve for unit B
12 Temperature sensor for liquid valve
and gas valve for unit C
13 Temperature sensor for liquid valve
and gas valve for unit D
14 Electronic expansion vale for unit A
15 Electronic expansion vale for unit C
16 Electronic expansion vale for unit B
17 Electronic expansion vale for unit D
18 Communication wire with indoor unit
19 Neutral wire for counication
20 Live wire
21 Neutral wire
22 Reactor wire 1
23 Reactor wire 2