Cooper & Hunter CH-IRT05NM User manual

Thank you for choosing Cooper&Hunter rooftop package units, please read this service manual carefully before
operation and retain it for future reference.
Models:
CH-IRT05NM
CH-IRT08NM
CH-IRT15NM
Service manual
Rooftop package units
ROOFTOP PACKAGE UNITS

I
Contents
PRODUCT INTRODUCTION ................................................................................................. 2
1 MODELS LIST.............................................................................................................................2
2 NOMENCLATURE.......................................................................................................................3
3 FUNCTION...................................................................................................................................3
4 PRODUCT DATA.........................................................................................................................4
4.1 PRODUCT DATA AT RATED CONDITION..............................................................................................4
4.2 OPERATION RANGE...............................................................................................................................5
4.3 ELECTRICAL DATA.................................................................................................................................6
5 PIPING DIAGRAM.......................................................................................................................6
UNITS CONTROL.................................................................................................................. 8
1 OPERATION FLOWCHART ........................................................................................................8
1.1 COOLING OPERATION ...........................................................................................................................8
1.2 HEATING OPERATION............................................................................................................................9
2 WIRELESS REMOTE CONTROLLER.......................................................................................10
3 WIRED CONTROLLER..............................................................................................................13
3.1 DISPLAY VIEW...................................................................................................................................... 13
3.2 OPERATION VIEW................................................................................................................................ 15
4 OPERATION INSTRUCTIONS OF SPECIAL FUNCTIONS.......................................................18
4.1 SETTING OF FILTER CLEAN REMINDER FUNCTION....................................................................... 18
4.2 LOW TEMPERATURE DRYING FUNCTION........................................................................................ 20
4.3 LOCK FUNCTION ................................................................................................................................. 20
4.4 MEMORY FUNCTION............................................................................................................................ 21
4.5 MODBUS INTERFACE.......................................................................................................................... 21
4.6 SWITCH BETWEEN FAHRENHEIT AND CENTIGRADE .................................................................... 23
4.7 ENQUIRY OF AMBIENT TEMPERATURE ........................................................................................... 23
4.8 ENQUIRY OF HISTORICAL MALFUNCTION ...................................................................................... 24
4.9 DEBUGGING FUNCTION ..................................................................................................................... 24
5 INSTALLATION OF WIRED CONTROLLER .............................................................................27
5.1 STANDARD ACCESSORIES................................................................................................................ 27
5.2 INSTALLATION POSITION AND REQUIREMENT............................................................................... 28
5.3 INSTALLATION OF WIRED CONTROLLER........................................................................................ 28
5.4 REMOVAL OF WIRED CONTROLLER ................................................................................................ 29
6 TROUBLESHOOTING...............................................................................................................30
INSTALLATION.................................................................................................................... 34
1 UNITS INSTALL.........................................................................................................................34
1.1 INSTALLATION POSITIONS................................................................................................................. 34
1.2 MATTERS NEED ATTENTION.............................................................................................................. 34
1.3 DIMENSION........................................................................................................................................... 38

II
2 DRAIN PIPING WORK................................................................................................................. 4 2
2.1 INSTALLATION PROCEDURE ............................................................................................................. 42
2.2 MATTERS OF ATTENTION. .................................................................................................................. 42
3 ELECTRIC WIRING WORK......................................................................................................... 4 3
3.1 WIRING PRINCIPLE. ............................................................................................................................. 43
3.2 ELECTRIC WIRING DESIGN. ............................................................................................................... 45
MAINTENANCE.................................................................................................................... 48
1 MALFUNCTION TABLE............................................................................................................... 4 8
1.1 MAIN CONTROL MALFUNCTION. ....................................................................................................... 48
1.2 DESCRIPTION OF DRIVE MALFUNCTION. ........................................................................................ 51
2 FLOW CHART OF TROUBLESHOOTING ................................................................................. 5 3
2.1 TROUBLESHOOTING FLOW CHART OF MAIN CONTROL MALFUNCTION ................................. 53
2.2 TROUBLESHOOTING FLOW CHART OF DRIVE MALFUNCTION................................................... 60
3 WIRING DIAGRAM...................................................................................................................... 6 4
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS . ........................................ 6 6
4.1 Model: CH-IRT05NM............................................................................................................................. 66
4.2 Model: CH-IRT08NM............................................................................................................................. 77
4.3 Model: CH-IRT15NM............................................................................................................................. 88
5 EXPLODED VIEWS AND SPARE PART LIST............................................................................ 9 8

Rooftop Packaged Service Manual PRODUCT
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PRODUCT

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PRODUCT INTRODUCTION
1 MODELS LIST
Nominal
Capacit
y
(Ton)
Model
Power
Supply
(V, Ph, Hz)
Appearance
Refrigerant
Model Name
5
R410A
CH-IRT05NM
380~415V,
3Ph,
50/60Hz
8
R410A
C H -IRT08NM
380~415V,
3Ph,
50/60Hz
15
R410A
CH-IRT15NM
380~415V,
3Ph,
50/60Hz
Notes:
①Above pictures may be different from actual model.
②1Ton =12000Btu/h = 3.517kW.

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3 FUNCTION
Function
Description
OPERATING EFFICIENCY
All units provide high operating efficiencies and have a minimum EER of 11.0 or above.
EXCLUSIVE COIL DESIGN
Grooved copper tubes and enhanced aluminum fin construction improves heat transfer
for maximum efficiency and durability.
TOP DISCHARGE
The top discharge condenser fan does not disrupt neighboring areas and does not
dry-out vegetation surrounding the unit. The warm air from the top mounted fan is blown
up away from the structure and any landscaping. This allows compact location on
multi-unit applications.
LOW OPERATING
SOUND LEVEL
The upward air flow carries the normal operating noise up and away from the living area.
The rigid and unique shock absorption structure greatly reduces the vibration and
effectively isolates motor sound.
SPACE SAVING
With compact and unitary structure, the unit can be connected and assembled at field,
which is in favor of transport and installation and saves indoor space.
2 NOMENCLATURE
CH
－
I
N
M
1
2
3
4
5
6
NO.
Description
Options
1
Product Category
CH=Cooper&Hunter
2
Compressor Type
I = Inverter.
3
4
5
6
RT 05
Cooling/Heating Capacity 05=5Ton;
08=8Ton......
Unit Type RT=Rooftop.
Refrigerant Options N=R410a;
Voltage Options M=380~415V,50/60Hz,3PH

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4 PRODUCT DATA
4.1 PRODUCT DATA AT RATED CONDITION
Nominal Capacity
(Ton)
5
8
15
Model Name
C H -IRT05NM
C H -IRT08NM
C H -IRT15NM
Performance
Rated Cooling
Capacity
Btu/h
53000
88000
136500
W
15530
25800
40000
Cooling Capacity
Range
Btu/h
24000~62000
31000~122800
50000~177400
W
7000~18150
9080~36000
14650~52000
EER
Btu/h /W
11.65
11.20
11.00
Rated Heating
Capacity
Btu/h
60000
88000
160400
W
17500
25800
47000
Heating
Capacity Range
Btu/h
15000~75000
31000~116000
50000~204700
W
4400~21980
9080~35000
14650~60000
Air Circulation
CFM (m3/h)
1677(2850)
2705（ 4600）
4942（ 8400）
Rated ESP
In.wg (Pa)
0.2(50)
0.28（ 70）
0.4（ 100）
COP
Btu/h /W
11.90
10.75
11.80
Electrical
Data
Power Supply
V, PH, Hz
380~415V, 3PH,
50/60Hz
380~415V, 3PH,
50/60Hz
380~415V, 3PH,
50/60Hz
M.C.A
A
8.2
13.6
20.5
Rated Power
Input
W
4550
7800
12500
Evaporator
fan
Type
Centrifugal
Centrifugal
Centrifugal
Quantity
1
1
2
Diameter
inch
224
8.8
239
9.4
239
9.4
Drive Type
Direct
Direct
Direct
Motor output
Hp
1
1
2
Motor rpm
rpm
900
920
1120
Compressor
Type
Inverter Rotary
Inverter Rotary
Inverter Rotary
Quantity
1
1
2
Oil type
FV50S or
equivalent
FV50S or
equivalent
FV50S or
equivalent
Condenser
Fan
Type
Axial-flow
Axial Fan
Axial Fan
Quantity
1
2
2
Diameter
inch
576
22.68
576
22.68
700
27.56
Drive Type
Direct Drive
Direct Drive
Direct Drive
Motor output
Hp
1
1
1
Motor rpm
rpm
1000
1000
680
Dehumidifyin
g
l/h
2.4
7.6
15.6
Drain
Connection
Size
inch
1
1
1

Rooftop Packaged Service Manual PRODUCT
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Refrigerant
Refrigerant
charge
kg (lbs)
5(12.98)
16（41.54）
21（54.52）
Type/Circuit
R410A/One
Refrigerant
Circuit
R410A/One
Refrigerant
Circuit
R410A/One
Refrigerant
Circuit
Refrigerant Control
Electronic
expansion valve
Electronic
expansion valve
Electronic
expansion valve
Dimensions(
W*D*H)
Outline
inch
68.9×43.3×32.1
83.1×57.1×48.4
110.6×88.2×48.4
mm
1750×1100×815
2110×1450×1230
2810×2240×1230
Package
inch
69.3×43.7×33.5
83.5×57.5×49.6
111.0×88.6×49.6
mm
1760×1110×850
2120×1460×1260
2820×2250×1260
Weight
Net
kg (lbs)
300(661.5)
537（1184）
900（1984）
Gross
kg (lbs)
320(705.6)
570（1257）
950（2094）
Filter
PP
Washable synthetic
Washable synthetic
Stuffing Quantity
20ft\40ft\40ft(Hi)
12/26/39
4/8/16
2/4/8
Notes:
①The cooling capacity stated above is measured under following conditions:
Indoor Conditions: 27℃DB/19℃WB (81℉DB/67℉WB);
Outdoor Conditions: 35℃DB/24℃WB (95℉DB/76℉WB).
②The air volume is measured at the relevant standard external static pressure.
③M.C.A: Minimum Circuit Ampacity.
④The technical parameters are changed along with the products improvement; please refer
to
the nameplate of the unit for actual data.
4.2 OPERATION RANGE
CH-IRT05NM,CH-IRT08NM
Item
Outdoor Condition (DB °C)
Cooling
-5~52
Heating
-15~24
CH-IRT15NM
Item
Outdoor Condition (DB °C)
Cooling
5~52
Heating
0~24

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4.3 ELECTRICAL DATA
Model
Compressor
Condenser Fan
Motors
Supply Blower
Motor
Breaker
Capacity
Min. Power
Supply Cord
Power Supply
Qty.
RLA
FLA
FLA
V/Ph/Hz
−
A
A
A
A
mm2
C H -IRT05NM
380-415,
3,50/60
1
8.2
3.15
5.0
25
4.0
CH-IRT08NM
380-415,
3,50/60
2
13.6
3.15
5.0
32
6.0
CH-IRT15NM
380-415,
3,50/60
2
20.5
4.0
5.0
50
10.0
5 PIPING DIAGRAM
(Refrigerant flowing direction is shown as the arrow)

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CONTROL

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UNITS CONTROL
1 OPERATION FLOWCHART
1.1 COOLING OPERATION
Satisfying open
Comp. condition
Temp of indoor
≤Set temp
Comp. stop
for 3 min NY
N
Y
Y
N
Open unit running at
cool mode
Indoor fan run
Comp. and outdoor
fan run
Comp. and
outdoor fan stop
Power
On

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1.2 HEATING OPERATION

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2 WIRELESS REMOTE CONTROLLER
Notes:
The wireless remote controller is an Optional Fitting
2.1 OPERATION AND DISPLAY VIEW
Table 2-2-1 Operation instruction of wireless remote controller
No.
Name
Function Description
Signal
transmitter
Signal transmitter
ON/OFF
button
Press this button and the unit will be turned on; press it once more, and the unit will be turned
off. When turning off the unit, the Sleep function will be canceled, but the presetting time is still
remained.
MODE
button
By pressing this button, Auto, Cool, Dry, Fan, Heat mode can be selected circularly. Auto
mode is default after power on. Under the Auto mode, the setting temperature will not be
displayed; Under the Heat mode, the initial value is 28°C (82°F);Under other modes, the initial
value is 25°C(77°F).
AUTO; COOL; DRY; FAN; HEAT (only for cooling and heating unit)

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- button
Preset temperature can be decreased by pressing this button. Pressing and holding this button
for more than 2 seconds can make the temperature changed quickly until release this button
and then transmit this order. The temperature adjustment is unavailable under the Auto mode,
but the order can be sent by pressing this button. Centigrade setting range: 16-30; Fahrenheit
scale setting range 61-86.
+ button
Preset temperature can be increased by pressing this button. Pressing and holding this button
for more than 2 seconds can make the temperature changed quickly until release the button
and then transmit this order. The temperature adjustment is unavailable under the Auto mode,
but the order can be sent by pressing this button. Centigrade setting range: 16-30; Fahrenheit
scale setting range 61-86.
FAN button
By pressing this button, Auto, Low, Middle, High speed can be circularly selected. After power
on, Auto fan speed is default.

Low speed
Middle speed
High speed
Note: Under the DRY mode, the fan will be kept running at the low speed and the fan speed isn't
adjustable.
SWING
UP/DOWN
button
Press this button to set up the swing angle, which circularly changes as below:
When the guide louver starts to swing up and down, if SWING functions is canceled, the air
guide louver will stop and remains at the current position.
Indicates the guide louver swings up and down among those five directions.(Simplified
SWING function applicable for some Fan Coil Units: When the wireless remote controller is
energized initially with the unit under the OFF status, it should be set by pressing the + button
and the SWING button simultaneously, with the symbol blinking twice. Then, after the unit is
turned on, this function can be activated by pressing the SWING button, with the displayed
symbol indicating swing function is on and without this displayed symbol indicating swing
function is off.)
CLOCK
button
By pressing this button, the clock is allowed to be set, with blinking, and then press the +/-
button to adjust the clock within 5 seconds. If the +/-button is pressed down constantly for more
than 2 seconds, the clock setting will be increased or decreased 10 minutes every 0.5 seconds.
After that, another press on the CLOCK button accepts the setting. 12:00 is the default, when
the wireless remote controller is energized.
TIMER ON
button
When TIMER ON is activated, ON will blink while the symbol will disappear. Within 5
seconds it is allowed to set the ON time by pressing the +/- button. Each press will make the
time increase or decrease one minute. Besides, the time can also be set by pressing the +/-
button constantly. that is, in the early 2.5 seconds, the time will increase/decrease quickly per
single minute, and in the late 2.5, the time will increase/decrease per ten minutes. After the
desired time value is set, press TIENE ON again to conform the setting within five seconds.
After that, another press on TIMER ON will cancel the setting. Prior to this setting, the clock
shall be set to the actual time.

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X-FAN
button
Pressing this button can activate or deactivate the X-FAN function. In Cool or Dry mode, by
pressing this button, if " " is displayed, it indicates the X-FAN function is activated. By
repressing this button, if " " disappears, it indicates the X-FAN function is deactivated. After
energization, X-FAN OFF is defaulted. If the unit is turned off, X-FAN can be deactivated but
can't be activated.
TEMP
button
By pressing this button it is allowed to select displaying the indoor setting temperature or the
indoor ambient temperature.
Indoor setting temperature is default after the indoor unit is energized initially.
By pressing the TEMP button, when the temperature symbol is displayed, the indoor
displayer will show the indoor setting temperature; when is displayed, it will show the
indoor ambient temperature; when is invalidation, If current displays indoor ambient
temperature, if received the other remote control signal, it will display presetting temperature,
5s later, will back to display the ambient temperature. (This function is applicable to partial of
models)
TIMER OFF
button
By pressing this button it is available to go to the TIMER OFF setting state with the same setting
method as that of the TIMER ON, in which case the OFF symbol blinks.
TURBO
button
In the Cool or Heat mode, pressing this button can activate or deactivate the TURBO function.
When the TURBO function is activated, its symbol will be displayed; when the running
mode or the fan speed is changed, this function will be canceled automatically.(This function is
applicable to partial of models).
SLEEP
button
By pressing this button, Sleep On and Sleep Off can be selected. After powered on, Sleep Off is
defaulted. Once the unit is turned off, the Sleep function is canceled. When Sleep is set to On,
the symbol of SLEEP will display. Under the Fan and Auto modes, this function is not
available.
LIGHT
button
Press this button to select LIGHT on or off in the displayer. When the LIGHT is set to on, the
icon will be displayed and the indicating light in the displayer will be on. When the LIGHT is
set to off, the icon will be disappeared and the indicating light in the displayer will be off.

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3 WIRED CONTROLLER
3.1 DISPLAY VIEW
Figure 2-3-1 Appearance of wired controller
Figure 2-3-2 LCD display of wired controller
Table 2-3-1 Instruction to LCD Display
No.
Icons
Introduction
1
Left and right swing function
2
Up and down swing function
3
Air exchange function

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4
Sleep function
5
Auto mode
6
COOL mode
7
DRY mode
8
FAN mode
9
HEAT mode
10
Health function
11
I-Demand function
12
Vacation function
13
Status display of master and slave wired controller
14
Shield function
The button operation, temperature setting, "On/Off" operation, "Mode" setting,
and "Save" setting are disabled.
15
Fan speed
16
Memory function
The unit will resume the original setting state after power recovery.
17
Turbo function
18
Energy-saving function
19
Ambient/setting temperature
20
Electric heater
21
Blow function
22
Defrosting function
23
Filter cleaning
24
Timer Setting
25
Keycard control / Detected status sensed by human body
26
Quiet function
27
Lock function

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3.2 OPERATION VIEW
3.2.1 Silk Screen of Buttons
Figure 2-3-3 Silk screen of buttons
3.2.2 Instruction to Function of Buttons
Table 2-3-2 Instruction to buttons of wired controller
No.
Description
Functions
1
Enter/Cancel
①.Function selection and canceling;
②.Press it for 5s to view the ambient temperature; press Mode button to
select viewing outdoor ambient temperature or indoor ambient
temperature.
2
▲
①.Running temperature setting range of indoor unit: 16~30℃(61~86℉);
②.Timer setting range: 0.5~24hr;
③.Setting of air function level;
④.Setting of energy-saving temperature;
⑤.Setting of cleaning class.
6
▼
3
Fan
Setting of high/medium high/medium/medium low/low/auto fan speed.
4
Mode
Setting of auto/cooling/heating/fan/dry mode of indoor unit.
5
Function
Switch over among these functions of swing/air/sleep/health/
I-Demand/out/turbo/save/e-heater/X-fan/clean/quiet.
7
Timer
Timer setting.
8
On/Off
Turn on/off indoor unit.
4 Mode
and
2 ▲
Memory function
Press Mode and ▲ buttons at the same time for 5s under off state of the unit to
enter/cancel memory function (If memory function is set, indoor unit will resume
original setting state after power failure and then power recovery. If not, indoor
unit is defaulted to be off after power recovery. Ex-factory setting of memory
function is on).

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2 ▲
and
6 ▼
Lock
Upon startup of the unit without malfunction or under off state of the unit, press
▲ and ▼ buttons at the same time for 5s to enter lock state. In this case, any
other buttons won‟t respond when pressing. Repress ▲ and ▼ buttons for 5s to
quit lock state.
4 Mode
and
5 Function
Enquiry and
setting of
address of wired
controller
Under off state of the unit, press Mode and Function buttons at the same time
for 5s to set the address. (More details please refer to project debugging)
5 Function
and
7 Timer
Setting of
project
parameters
(More details
please refer to
the Notes)
Under off state of the unit, press Function and Timer buttons at the same time
for 5s to go to the debugging menu. Press Mode button to adjust the setting
items and press ▲ or ▼ buttons to set the actual value.
4 Mode
and
6 ▼
Switch between
Fahrenheit and
Centigrade
Under off state of the unit, press Mode and ▼ buttons at the same time for 5s to
switch between Fahrenheit and Centigrade.
5 Function
and
6 ▼
Viewing
historical
malfunction
Continuously press Function and ▼ buttons for 5s to view historical
malfunction. Then press ▲ and ▼ buttons to adjust displayed contents. The
timer displaying position displays the sequence of malfunction and the detailed
error code. The 5th displayed malfunction is the last malfunction.
1 Enter/Cancel
and
4 Mode
Setting of
master and
slave wired
controller
Under off state of the unit, press Enter/Cancel and Mode buttons at the same
time for 5s to set master and slave wired controller. Press ▲ or ▼ button to
adjust. (More details please refer to project debugging)
Notes:
The following functions can be set through Function and Timer buttons: setting of ambient temperature
sensor, selecting three speeds in high speed and three speeds in low speed of indoor fan motor, display
setting of freeze protection error code, setting of cold air prevention and hot air hot prevention function,
setting of refrigerant-lacking protection function, selecting of blowing residual heat of indoor unit, selecting
of compressor electric heater mode, selecting of low-power consumption mode, selecting door control
function, selecting human sensitive function, long-distance monitoring, temperature compensation value at
the air return port.
3.2.3 Setting of Wired Controller’s Address
3.2.3.1 Enquiry and Setting of Wired Controller‟s Address
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting
interface of wired controller‟s address. In this case, LCD displays address number. Then press▲ or ▼
button to adjust address and then press “Enter/Cancel”button to confirm. The address setting is related to
the setting of Debugging Function 4.9.10. When the selection in 4.9.10 is 00, address of centralized
controller is to be set and the address setting range is 01~16; when the selection in 4.9.10 is 01, address of
long-distance monitor is to be set and the address setting range is 01~255.

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Enquiry and setting of wired controller‟s address is shown as Figure 2-3-4 below:
Figure 2-3-4 Enquiry and setting of wired controller‟s address
3.2.3.2 Setting of Master/Slave Wired Controller‟s Address
Under off status of the unit, press Enter/Cancel and Mode buttons at the same time for 5s to go to the
enquiry and setting interface of master/slave wired controller. In this case, LCD displays wired controller‟s
address (01 for master wired controller and 02 for slave wired controller). Press ▲ or ▼ button to adjust
address of master/slave wired controller and then press Enter/Cancel button to confirm. If slave wired
controller is set, the icon will be displayed.
Note:
If there is only one wired controller, it only can be set as the master; If there are two wired controllers,
one should be the master and the other should be the slave.
Setting of master/slave wired controller‟s address is shown as Figure 2-3-5 below: