13.EXPLODED VIEWS AND SPARE PARTS LISTS .................................................13-1
14. APPENDIX A .........................................................................................................14-1
SM CN 1-E.1 GB
i
Page 4
1.INTRODUCTION
CONTENT
1.1 General
The CN DCI Inverter Cassette type split air conditioner range comprise RC (heat pump)
models, as follows:
● CN 25
● CN 35
● CN 50
● CN 60
● CN 70
1.2 Main Features
The CN DCI series benefits from the most advanced technological innovations,
namely:
● DC inverter technology.
● R410A refrigerant.
● High COP.
INTRODUCTION
● Precharged refrigerant.
● Low Sound level for both Indoor and Outdoor.
● 60 x60 cm dimension designed for integration in suspended ceilings.
● DC Brushless fan motor.
● New grille, modern style with elegant lines in line with every interior decor , 2 panels
optional available (hard ceiling / Suspended ceiling).
● Motorized air distribution flaps.
● Very slim profile 219 mm at size 9-12, and 270 mm at size 18-24.
● Option of fresh air intake, and air distribution to adjacent room.
● Integrated condensate pump with a lift of 1 m Max.
● Connection to Multisplit outdoor units.
● Up to 30 m pipe length between indoor and outdoor units.
● Up to 15 m vertical high between indoor and outdoor units.
● Cooling operation at outdoor temperature down to -10°C.
● Heating operation at outdoor temperature down to -15°C.
● Built in over-flow protection against the condensate water.
● Easy installation and service.
SM CN 1-E.1 GB
● Product can have the option of additional function of Ionizer and ESF.
● Fan speed can be adjusted by compensation on PCB according to different installation
height (Field option).
1-1
Page 5
INTRODUCTION
CONTENT
1.3 Indoor Unit
The indoor unit is cassette type indoor unit, and can be easily fitted to many types of
residential and commercials applications.
It includes:
● Coil with hydrophilic aluminum fins.
● Motorized flaps (two step motors).
● Advanced electronic control box assembly (DCI storm).
● Low sound level of the indoor fan.
1.4 Filtration
The CN series presents several types of air filters:
● Easily accessible, and re-usable pre-filters.
● Easily Static Filter (Field Option).
1.5 Control
The microprocessor indoor controller, and an infrared remote control, supplied as
standard, providing complete operating function and programming. For further details
please refer to the Operation Manual, Appendix A.
1.6 Outdoor Unit
The CN outdoor units can be installed as floor or wall mounted units by using a wall
supporting braCNet. The metal sheets are protected by anti- corrosion paint work
allowing long life resistance. All outdoor units are pre-charged. For further information
please refer to the Product Data Sheet, Chapter 2.
It includes:
● Compressor mounted in a soundproofed compartment:
Single Rotary – for DCI 25 and DCI 35.
Scroll – for DCI 50 and DCI 60.
Twin Rotary – for DCI 72Z.
● Axial fan.
1-2
● Outdoor coil with hydrophilic louver fins for RC units.
● Outlet air fan grill.
● Service valves” flare” type connection.
● Interconnecting wiring terminal bloCN.
SM CN 1-E.1 GB
Page 6
1.7 Tubing Connections
CONTENT
Flare type interconnecting tubing to be produced on site.
For further details please refer to the Installation Manual, Chapter 10.
1.8 Accessories
Remote Control.
Panel 625x625 for gird ceiling.
Panel 725x725 for hard ceiling.
ESF & Ionizer kit.
1.9 Inbox Documentation
Each unit is supplied with its own installation and operation manuals.
1.10 Matching Table
1.10.1 R410A
INTRODUCTION
INDOOR UNITS
OUTDOOR UNITS
MODELREFRIGER. CN 25CN 35CN 50 CN 60CN 70
DCI25/35/50R410A
DCI 60R410A
DCI 72ZR410A
The above table lists outdoor units and PXD DCI indoor units which can be matched together.
In addition the listed outdoor units can be matched with other types of indoor units such as cassettes
and wall mounted.
For further information please refer to the relevant Service Manual.
√√√
√
√
SM CN 1-E.1 GB
1-3
Page 7
2.PRODUCT DATA SHEET
CONTENT
2.1 CN 25 DCI R410A
PRODUCT DATA SHEET
Model Indoor Unit
Model Outdoor Unit
Installation Method of PipeFlared
CharacteristicsUnitsCooling Heating
Capacity
Power input
EER (Cooling) or COP(Heating)
Energy efficiency classAA
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA2.6 3.6
Starting currentA10.5
Circuit breaker ratingA15
Operation control type Remote control
Heating elementskWNA
(4)
(4)
(4)
Fan type & quantityCentrifugal x 1
Fan speedsH/M/LRPM550/450/350600/500/400
Air flow
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
Moisture removall/hr0.7
Condensate drain tube I.Dmm20
INDOOR
DimensionsWxHxDmm575X575X219
Weightkg13(2.2/2.8)
PaCNage dimensionsWxHxDmm681X681X297
PaCNaged weightkg15
Units per palletunits12
StaCNing heightunits6 levels
Refrigerant controlElectronical Expansion Valve
Compressor type, modelSingle Rotary DC Inverter, Panasonic 5RS102XAB
Fan type & quantityPropeller x 1
Fan speedsH/LRPM830
Air flow H/Lm3/hr1780
Sound power levelH/LdB(A)6061
Sound pressure level
DimensionsWxHxDmm795*290*610
Weightkg38
PaCNage dimensionsWxHxDmm945*395*655
PaCNaged weightkg42
Units per palletUnits9
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
SM CN 1-E.1 GB
2-1
Page 8
PRODUCT DATA SHEET
CONTENT
2.2 CN 35 DCI R410A
Model Indoor Unit
Model Outdoor Unit
Installation Method of PipeFlared
CharacteristicsUnitsCooling Heating
Capacity
Power input
EER (Cooling) or COP(Heating)
Energy efficiency classAA
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA4.3 5.2
Starting currentA10.5
Circuit breaker ratingA15
Operation control type Remote control
Heating elementskWNA
(4)
(4)
(4)
Fan type & quantityCentrifugal x 1
Fan speedsH/M/LRPM600/500/400650/550/450
Air flow
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
Moisture removall/hr1.38
Condensate drain tube I.Dmm20
INDOOR
DimensionsWxHxDmm575X575X219
Weightkg13
PaCNage dimensionsWxHxDmm681X681X297
PaCNaged weightkg15
Units per palletunits12
StaCNing heightunits6 levels
Refrigerant controlElectronical Expansion Valve
Compressor type, modelSingle Rotary DC Inverter, Panasonic 5RS102XAB
Fan type & quantityPropeller x 1
Fan speedsH/LRPM830
Air flow H/Lm3/hr1780
Sound power levelH/LdB(A)6262
Sound pressure level
DimensionsWxHxDmm795*290*610
Weightkg38.5
PaCNage dimensionsWxHxDmm945*395*655
PaCNaged weightkg42.5
Units per palletUnits9
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
2-2
SM CN 1-E.1 GB
Page 9
2.3 CN 50 DCI R410A
CONTENT
PRODUCT DATA SHEET
Model Indoor Unit
Model Outdoor Unit
Installation Method of PipeFlared
CharacteristicsUnitsCooling Heating
Capacity
Power input
EER (Cooling) or COP(Heating)
Energy efficiency classAA
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA7.0 7.2
Starting currentA10.5
Circuit breaker ratingA20
Operation control type Remote control
Heating elementskW
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
(4)
(4)
(4)
Fan type & quantityCentrifugal x 1
Fan speedsH/M/LRPM750/650/550750/650/550
Air flow
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
DimensionsWxHxDmm575*575*270
Weightkg???
PaCNage dimensionsWxHxDmm575X575X270
PaCNaged weightkg15.2
Units per palletunits681X681X348
StaCNing heightunits17.7
Refrigerant controlElectronical Expansion Valve
Compressor type,modelSingle Rotary DC Inverter,Panasonic 5RS130XCC03
Fan type & quantityPropeller x 1
Fan speedsH/LRPM920
Air flow H/Lm3/hr2160
Sound power levelH/LdB(A)6263
Model Indoor Unit
Model Outdoor Unit
Installation Method of PipeFlared
CharacteristicsUnitsCoolingHeating
Capacity
Power input
EER (Cooling) or COP(Heating)
Energy efficiency classBC
Power supplyV/Ph/Hz220-240V/Single/50Hz
Rated currentA8.6 9.5
Starting currentA15
Circuit breaker ratingA20
Operation control type Remote control
Heating elements (Option)kW
(4)
(4)
(4)
Fan type & quantityCentrifugal x 1
Fan speedsH/M/LRPM800/7100/600800/700/600
Air flow
External static pressureMin-MaxPa0
Sound power level
Sound pressure level
Moisture removall/hr2.62
Condenstate drain tube I.Dmm20
INDOOR
DimensionsWxHxDmm575X575X270
Weightkg15.2
PaCNage dimensionsWxHxDmm681X681X348
PaCNaged weightkg17.7
Units per palletunits12
StaCNing heightunits6 levels
Refrigerant controlEEV
Compressor type,modelE-Scroll MATSUSHITA 5CS130XCC03
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM820
Air flow H/Lm3/hr2860
Sound power levelH/LdB(A)65
Sound pressure level
DimensionsWxHxDmm846x690x302
Weightkg46
PaCNage dimensionsWxHxDmm990x770x430
PaCNaged weightkg50
Units per palletUnits9
OUTDOOR
StaCNing heightunits3 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m1.65kg/7.5m
Additional charge per 1 meterg/mNo Need
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
DimensionsWxDxHmm575X575X270
Weight(kg15.5
PaCNage dimensionsWxDxHmm681X681X348
PaCNaged weightkg18
Units per palletunits12
StaCNing heightunits6 levels
Refrigerant controlEEV
Compressor type,modelTwo Rotary,Mitsubishi TNB220F
Fan type & quantityPropeller(direct) x 1
Fan speedsH/LRPM850
Air flow H/Lm3/hr3350
Sound power levelH/LdB(A)65
Sound pressure level
(3)
H/LdB(A)55
DimensionsWxHxDmm950x412x835
Weightkg65
PaCNage dimensionsWxHxDmm1080x477x910
PaCNaged weightkg70
Units per palletUnits9
OUTDOOR
StaCNing heightunits3 levels
Refrigerant typeR410A
Refrigerant chargless distancekg/m2.045kg/7.5m
Additional charge per 1 meterg/mNo Need
Max.height differencem.Max.15
Operation control type Remote control
Heating elements (Option)kW
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
SM CN 1-E.1 GB
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Page 12
PRODUCT DATA SHEET
CONTENT
2.6 Optional accessory
Panel 625x625(Optional accessory)For all the models
Dimensions (H x L x D) mm625x625x40
Weight kg2.2
PaCNage Dimensions (H x L x D) mm700x700x103
PaCNage Weight kg3.4
Units per palletunits20
StaCNing heightunits10 levels
Panel 725x725(Optional accessory)For all the models
Dimensions (H x L x D) mm725x725x40
Weight kg2.7
PaCNage Dimensions (H x L x D) mm800x800x103
PaCNage Weight kg4.2
Units per palletunits10
StaCNing heightunits10 levels
2-6
SM CN 1-E.1 GB
Page 13
3. RATING CONDITIONS
CONTENT
Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units)
and EN 14511.
5.6 Capacity Correction Factor Due to Tubing Length
5.6.1 Cooling
TOTAL TUBING LENGTH
Model
ז
3m
1.02
7.5m
1
10m15m20m25m30m40m50m
0.980.960.950.950.93------
* Minimum recommended tubing length between indoor and outdoor units is 3m.w
5.6.2 Heating
TOTAL TUBING LENGTH
Model
3m
1.02
7.5m
1
10m15m20m25m30m40m50m
0.980.960.950.950.93------
* Minimum recommended tubing length between indoor and outdoor units is 3m.
5.7 Fresh air volume to the external static pressure (Field option)
KnoCN-down opening :φ100mm on the casing for the fresh duct
Fresh air control: by external booster fan
Select the fresh air volume according to required external static pressure.
Fresh air volume Vs. ESP
)h/3m(emuloVriAhserF
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
10152025303540
ESP(Pa)
5.8 Conditioned air supply to adjacent room (Field option)
(To be finished)
SM CN 1-E.1 GB
5-21
Page 38
SOUND LEVEL CHARACTERISTICS
CONTENT
6. SOUND LEVEL CHARACTERISTICS
6.1Sound Pressure Level
1.5m
Unit
Mic.
Figure 1
6.2 Soud Pressure Level Spectrum (Measured as Figure 1)
CN 25CN 35
NC-70
NC-60
NC-50
NC-70
NC-60
NC-50
APPROXIMATE
THRESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
FAN SPEEDLINE
HI
ME
LO
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-40
NC-30
NC-20
BAND CENTER FREQUENCIES, Hz
SM CN 1-E.1 GB
6-1
Page 39
SOUND LEVEL CHARACTERISTICS
CONTENT
CN 50CN 60
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
CN 70
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
2. Refrigerant Valve Port (use Allen wrench to open/close)
3. Valve Protection Cap
4. Refrigerant Valve
5. Service Port Cap
6. Flare Nut
7. Unit BaCN Side
8. Copper Tube
When the outdoor unit is installed above the indoor unit an oil trap is required every 5m along the suction
line at the lowest point of the riser. Incase the indoor unit is installed above the outdoor, no trap is
required.
SM CN 1-E.1 GB
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Page 48
CONTROL SYSTEM
CONTENT
11. CONTROL SYSTEM
11.1 General Functions and Operating RulesThe DCI software is fully
parametric.
All the model dependent parameters are shown in Blue color and with Italic style [parameter].
The parameters values are given in the last section of this control logic chapter of the service manual.
11.1.1 System Operation Concept
The control function is divided between indoor and outdoor unit controllers. Indoor unit is the system
‘Master’, requesting the outdoor unit for cooling/heating capacity supply. The outdoor unit is the
system ‘Slave’ and it must supply the required capacity unless it enters into a protection mode
avoiding it from supplying the requested capacity.
The capacity request is transferred via indoor to outdoor communication, and is represented by a
parameter called ‘NLOAD’. NLOAD is an integer number with values between 0 and 127, and it
represents the heat or cool load felt by the indoor unit.
11.1.2 Compressor Frequency Control
11.1.2.1 NLOAD setting
The NLOAD setting is done by the indoor unit controller, based on a PI control scheme.
The actual NLOAD to be sent to the outdoor unit controller is based on the preliminary LOAD
calculation, the indoor fan speed, and the power shedding function.
NLOAD limits as a function of indoor fan speed:
Indoor Fan Speed Maximum NLOAD Cooling Maximum NLOAD Heating
Indoor Fan SpeedMaximum NLOAD Cooling Maximum NLOAD Heating
When the unit is running normally , the compressor frequency change rate is 1 Hz/sec.
11.1.5 Compressor Starting Control
11.1.5.1 Compressor starting control for DCI25/35/50/60
Step3
Step2
Step1
1
1
Minute
11.1.5.2 Compressor starting control for DCI72Z
Step 1
Minute
Min 10 Minutes
Time
Whenever the compressor starts up, after it has been off for more than 45 minutes, the compressor
frequency cannot go below Step1RPS for 3 continuous minutes (this rule comes to ensure oil return to the compressor).
Step 2
The compressor speed cannot go above Step2RPS once after each compressor start up for 3
continuous minutes (this rule comes to prevent oil exit from the compressor after its start up).
Step 3
The speed cannot go higher than Step3RPS unless it was operating for more than 1 continuous
minutes between Step3RPS – 5 and Step3RPS .
After passing above Step3RPS, this rule is re-applied when passing below Step3RPS-5.
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CONTROL SYSTEM
CONTENT
11.1.6 Minimum On and Off Time
3 minutes
11.1.7 Indoor Fan Control
8 Indoor fan speeds are determined for each model. 4 speeds for cool/dry/fan modes and 4speeds
for heat mode.
When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate constantly
at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set
according to the cool/heat load.
11.1.7.1 Turbo Speed
The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is
selected and under the following conditions:
Difference between set point and actual room temperature is bigger then 3 degrees.
Room temperature > 22 for cooling, or < 25 for heating.
11.1.8 Outdoor Fan Control
11.1.8.1 Outdoor Fan Control for DCI25/35/50/60
7 outdoor fan speeds are determined for each model. 3 speeds for cool and dry modes, and 3speeds
for heat mode, and a very low speed.
Outdoor fan speed is a function of compressor frequency and outdoor air temperature (OAT).
4 routines for fan control are determined. The control routine selection depends on operation mode,
compressor speed, outdoor air temperature (OAT) and heat sink temperature (HST).
Routine Conditions
A
Heating with OAT < 15ഒ or
Cooling with OAT > 20ഒ, or Faulty OAT
BCooling with 20ഒ > OAT > 7ഒ
CCooling with 7ഒ > OAT
DHeating with OAT > 15ഒ
OFAN Speed
Compressor
Target Frequency
Freq=0OFFOFFOFFOFF
10 ≤ Freq < OFLowFreqLowLowVLLow
OFLowFreq ≤ Freq<
OFMedFreq
OFMedFreq≤ FreqHighLowLowMedium
Routin
A
MediumLowVLLow
Routin
B
Routin
C
Routin
D
11-4
SM CN 1-E.1 GB
Page 52
CONTROL SYSTEM
CONTENT
OFAN State
at Cool Mode
$
%
&
Note: Periorities A>B>C
3 Degrees
3 Degrees
2$ 7
HST
Change To Higher
OFAN Cool state (*1)
50
45
Change To lower
OFAN Cool state
(*1) If State C, change to B
If State B, change to A
When compressor is switched to OFF and the heat sink temperature is above 55 degrees, the
outdoor fan will remain ON in low speed for up to 3 minutes.
11.1.8.2 Outdoor Fan Control for DCI72Z
OFAN operates between OFMinRPM to OFMaxRPM.
Min time for speed change of OFAN OFMinTimeReduce (60 seconds).
There are 4 defined speeds – High, Med, Low, and Very Low.
The actual OFAN speeds in cool mode are defined according to the following table:
The fan speed is also related to protections and OMT value.
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Page 53
CONTROL SYSTEM
CONTENT
11.1.9 EEV (Electronic Expansion Valve) Control
11.1.9.1 EEV Control for DCI25/35/50/60
EEV opening is defined as EEV = EEV
EEV
is the initial EEV opening as a function of the compressor frequency, operation mode, unit
OL
+ EEV
OL
CV
model and capacity.
EEV
During the first 5 minutes of compressor operation EEV
is a correction value for the EEV opening that is based on the compressor temperature.
CV
CV
= 0.
Once the first 5 minutes are over, the correction value is calculated as follow: EEVCV(n) = EEVCV(n-1)
+ EEV
EEV
CTT
is the correction based on the compressor temperature. A target compressor temperatureзs
CTT
set depending on frequency and outdoor air temperature, and the actual compressor temperature is
compared to the target temperature to set the required correction to the EEVopening.
11.1.9.2 EEV Control for DCI72Z
The target EEV value is the sum of open loop value (OL) and a result of the accumulative correction
values (CV).
EEVEEVEEV
CVOL
Initial EEV value is set according to compressor frequency and according to indoor and outdoor
model
The corrective value is calculate every 30 sec the EEV corrective value is set to keep the discharged
super heat temperature between 20º to 30º in cooling and 12º to 20º in heating.
11-6
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Page 54
CONTROL SYSTEM
CONTENT
11.1.10 RV(Reversing Valve) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.
11.1.10.1 Ioniser Control
Ioniser is on when unit is on ,AND indoor fan is on ,AND Ioniser power switch (on grille) is on.
11.1.10.2 Base Heater Control
The base heater will be working only when RV is “ON” according to the following graph:
Base
Heater
OFF
ON
0
2
OAT
When OAT is faulty the base heater will be “ON” continuously in HEAT mode.
11.1.11 Fan Mode
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the difference between
actual room temperature and user set point temperature.
11.1.12 Cool Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by fuzzy control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
11.1.13 Heat Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by fuzzy control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
11.1.11.1 Temperature Compensation
In ducted and cassette models, 3 degrees are reduced from room temperature reading (except when
in I-Feel mode), to compensate for temperature difference between high and low areas in the heated
room, and for coil heat radiation on room thermistor.
The temperature compensation can be enabled/disabled by shortening of J2 on the indoor unit
Controller
SM CN 1-E.1 GB
ModelJ2 ShortedJ2 Opened
CassetteCompensation EnabledCompensation Disabled
DuctedCompensation EnabledCompensation Disabled
11-7
Page 55
CONTROL SYSTEM
CONTENT
11.1.11.2 Indoor Fan Control in Heating Mode
Indoor fan speed depends on the indoor coil temperature:
11.1.14 Auto Cool/Heat Mode
When in auto cool heat mode unit will automatically select between cool and heat mode according to
the difference between actual room temperature and user set point temperature (.T).
Unit will switch from cool to heat when compressor is off for 3 minutes, and .T < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and .T < -3.
11.1.15 Dry Mode
As long as room temperature is higher then the set point, indoor fan will work in low speed and
compressor will work between 0 and MaxNLOADIF1C Hz.
When the room temperature is lower than the set point, compressor will be switched OFF and indoor
fan will cycle 3 minutes OFF, 1 minute ON.
11.1.16 Protections
There are 5 protection codes.
Normal (Norm) – unit operate normally.
Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown1 (D1) – Compressor frequency is reduced by 2 to 5 Hz per minute.
HzDown2 (D2) – Compressor frequency is reduced by 5 to 10 Hz per minute.
Stop Compressor (SC) – Compressor is stopped.
11.1.16.1 Indoor Coil Defrost Protection — CN
Min(ICT,ICTE)
Fast Increasing IncreasingNo ChangeDecreasingFast Decreasing
11.1.19.1 Outdoor coil Deicing Protection For DCI25/35/50/60/72Z
• Entering Deicing Conditions
Deicing operation will start when either one of the following conditions exist:
Case 1: OCT < OAT – 8 AND TLD > DI
Case 2: OCT < OAT – 12 AND TLD > 30 minutes.
Case 3: OCT is Invalid AND TLD > DI
Case 4: Unit is just switched to STBY AND OCT < OAT – 8
Case 5: NLOAD = 0 AND OCT < OAT -8
Case 6: OCT<-19 AND TLD>60 minutes
All this condition will exist during 10 seconds
OCT – Outdoor Coil Temperature
OAT – Outdoor Air Temperature
TLD – Time from Last Deicing
DI – Deicing Interval (Time Interval Between Two Deicing)
Deicing interval time when compressor is first started in heat mode, is 10 minutes if OCT < -2, and
is 40 minutes in other cases.
Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of deicing
time. If deicing time is shorter then former deicing time, the deicing interval time will be increased. If
deicing time is longer then former deicing time, the deicing interval time will be decreased.
Lights up during operations. Blinks when compressor is stopped as
a result of a thermodynamic protection.
Lights up during ESF/ ionizer operation.
Lights up during Timer and Sleep operation.
Lights up when Air Filter needs to be cleaned.
Every short pressing , the next operation mode is selected, in this
order : SB → Cool Mode → Heat Mode → SB → …
Press to turn off the filter indicator and to reset the filter function,
after the cleaned filter has been reinstalled.
11-12
In long pressing the system enters into diagnostic mode.
SM CN 1-E.1 GB
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CONTROL SYSTEM
r
r
r
A
p
CONTENT
11.1.22.2 Outdoor Unit controller Indicatiors
Unit has three LED’s.
SB LED is ON when power is ON (230 VAC, even when no communication).
STATUS LED is ON when COMP is ON, and Blinks according to diagnostics mode definitions when
either fault or protection occurs.
FAULT LED Blinks according to diagnostics mode definitions when either fault or protection occurs.
11.1.23 DIP switch settings
Indoor Unit Controller
11.1.23.1 Power PCB - CN
11.1.23.2 Main PCB - CN
12Pin Displayer Cable
larm Output
Unit On Out
RC-W Power
ut
RC-W
PD/PS
PUMP
Wire to Main PCB
DC Motor Cable
Self Test Jumper
DIP Switch
M2L Port
MCU Flash Port
Safety switch Terminals
SM CN 1-E.1 GB
Inoizer
ESF
Swing Motor
ICTE Senso
ICT Senso
RAT Senso
Water Level
11-13
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CONTENT
11.1.23.3 Main PCB − CN
ICTE sensor
ICT sensor
RAT sensor
M2L Port
DIP Switch
WATER level
Unit On output
ALARM output
MCU Flash Port
IF Motor
RCW Power
RCW
16 Pins Display (not used)
To Display
Water Pump
11-14
Fresh Air
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Page 62
11.1.24 Self Test Jumper(J1))
CONTENT
● Jumper for production line only, never install jumper on site!
11.1.25 DIP Switch and Jumper Settings
● CN - Dip switch default setting for each model
CONTROL SYSTEM
DIP
MODEL
2.5 KWONOFFOFFOFFOFFOFFONOFF
3.5 KWONOFFOFFONOFFOFFONOFF
5.0 KWONONOFFOFFOFFOFFONOFF
6.0 KWONONOFFONOFFOFFONOFF
7.0 KWONONOFFOFFONOFFONOFF
J
12345678
J2J3J6J7J8J9J12J13
● CN - Dip switch default setting for each model
DIP
MODEL
2.5 KWONOFFOFFONOFFOFFONOFF
3.5 KWONOFFOFFOFFONOFFONOFF
5.0 KWONOFFOFFONONOFFONOFF
6.0 KWONONOFFOFFOFFOFFONOFF
7.0 KWONONOFFONOFFOFFONOFF
J
*Water pump and float switch setting
In case of vertical installation, change dipswitch 7 to OFF position to cancel their operation.
1234567*8**
J2J3J5J7J8J9J10J12
**High external static pressure
There is an option of increasing the airflow if the ESP (external static pressure) is higher than
planned. To increase the speed change dipswitch 8 to ON position.
● Compensation setting (Factory setting)
This setting activates the compensation to the return air temperature in heating mode. For indoor unit
like cassette, the DIP switch J2 should be ON.
CompensationJ2
Activated(factory setting)ON
DeactivatedOFF
● Unit model setting (Factory setting)
The unit model setting should be in accordance with the unit model on the nameplate. The unit
operating parameters will be improper with wrong settings.
Unit model(Capacity)J3J6J7J8
2.5kW modelOFFOFFOFFOFF
3.5kW modelOFFOFFONOFF
5.0kW modelONOFFOFFOFF
6.0kW modelONOFFONOFF
7.0kW modelONOFFOFFON
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● Presence Detector/Power Shedding Selection
Select the functions of dry contact PD/PS by setting the Dip switch J9
SelectionJ9
Presence DetectorOFF
Power SheddingON
● Installation of height compensation settings (By installer)
The compensation settings according to installation height should be set by using the dip switch J12,
J13 on the controller PCB
The Alarm Output dry contact will be on (closed), when a predefined set faults occur.
The fault set is defined under diagnostics section.
The alarm output will be off (open), when the predefined fault is cleared.
The indoor alarm outputs are defined according to the following IDU Diagnostic Table:
NoProblemAO54321
1ICT is disconnectedYes00001
2ICT is shortedYes00010
3RAT is disconnectedYes00011
4RAT is shortedYes00100
5Reserved (for MSMP used as RGT fault)No00101
…ReservedNo
17Defrost protectionNo10001
18Deicing ProtectionNo10010
19Outdoor Unit ProtectionNo10011
20Indoor Coil HP ProtectionNo10100
21Overflow ProtectionYes10101
22ReservedNo
24EEPROM Not UpdatedNo11000
25Bad EEPROMNo11001
26Bad CommunicationNo11010
27Using EEPROM dataNo11011
28Model ANo11100
29Model BNo11101
30Model C No11110
31Model DNo11111
* CN Unit only
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CONTENT
OUD Diagnostic Table
AO - Alarm output
NoProblemAO54321
1OCT is disconnectedYes00001
2OCT is shortedYes00010
3CTT is disconnectedYes00011
4CTT is shortedYes00100
5HST is disconnected (when enabled)Yes00101
6HST is shorted (when enabled)Yes00110
7OAT is disconnected (when enabled)Yes00111
8OAT is shorted (when enabled)Yes01000
9TSUC is disconnected (when enabled)Yes01001
10TSUC is shorted (when enabled)Yes01010
11IPM FaultYes01011
12Bad EEPROMNo01100
13DC under voltageYes01101
14DC over voltageYes01110
15AC under voltage Yes01111
16Mismatch IDU & ODU models
17No CommunicationYes10001
18Reserved No10010
20Heat sink Over HeatingNo10100
21DeicingNo10101
22Compressor Over HeatingNo10110
23Compressor Over CurrentNo10111
24No OFAN FeedbaCNNo11000
25OFAN loCNedYes11001
26Compressor LoCNYes11010
27Bad CommunicationNo1101 1
28Missing ODU configuration
29Undefined ODU Model
30For future useNo11110
31Operation condition is exceeded
(*SW 35V14 and above)Yes11101
(*SW 35V14 and above)Yes10000
(*SW 35V14 and above)Yes11100
(*SW 35V14 and above)Yes11111
*Alarm Output - is on SW 35V14 and above. There is no alarm on SW 35V12 and below/
The ‘On/Off status’ dry contact will be on (closed), when the indoor mode is not STBY.
If the indoor mode is STBY mode, the ‘On/Off status’ will be off (open).
System can enter Test mode in two ways:
Automatically when the following conditions exists for 30 minutes continuously:
Mode = Cool, Set point = 16, Room temperature = 27(+1/-2), Outdoor temperature = 35(+2/-1)
Or
Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±(+1/-2)
Manually when entering diagnostics with the following settings:
Mode = Cool, Set point = 16
Mode = Heat, Set point = 30
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11.2.3 Unit Operation in Test Mode
In test mode, the unit will operate in fixed settings according to the indoor fan speed setting:
When Power Up – the whole outdoor unit controller, including the wiring, is under
HIGH VOLTAGE!!!
Never open the Outdoor unit before turning off the Power!!!
When turned off, the system is still charged (400V)!!!
It takes about 3 Min. to discharge the system.
Touching the controller before discharging may cause an electrical shoCN!!!
For safe handling of the controller please refer to section 12.6 below.
12.1 General DCI Single Split System failures and Corrective Actions
NoSYMPTOM
1
2
3
4
Power supply indicator (Red
LED) does not light up.
Unit does not respond to
remote control message
Unit responds to remote
control message but Operate
indicator (Green LED) does
not light up
Indoor fan does not start
(louvers are opened and
Green LED does light up)
PROBABLE
CAUSE
CheCN power supply. If power supply
No power supply
Remote control
message not reached
the indoor unit
Problem with display
PCB
Unit in heat mode and
coil is still not warm.
Problem with PCB or
capacitor
is OK, cheCN display and display
wiring. if OK, replace controller.
CheCN remote control batteries, if
batteries are OK, cheCN display and
display wiring, if OK, replace display
PCB.
If still not OK replace controller.
Replace display PCB.
If still not OK replace controller.
Change to cool mode and cheCN.
Change to high speed and CheCN
power supply to motor is higher than
130VAC (for triaCN controlled motor)
or higher than 220VAC for fixed speed
motors, if OK replace capacitor, if not
OK replace controller
CORRECTIVE ACTION
SM CN 1-E.1 GB
Indoor fan works when unit
5
6Compressor does not start
7
is OFF, and indoor fan speed
is not changed by remote
control command.
Compressor stops during
operation and Green LED
remains on
PCB problemReplace controller
Electronics control
problem or protection
Electronic control
or power supply
problem
Perform diagnostics (See 12.3), and
follow the actions described.
Perform diagnostics (See 12.3), and
follow the actions described.
12-1
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NoSYMPTOM
8
9
10
11
12
Compressor is on but outdoor
fan does not work
Unit works in wrong mode
(cool instead of heat or heat
instead of cool)
All components are operating
properly but no cooling or no
heating
Compressor is over heated
and unit does not generate
capacity
Units goes into protections
and compressor is stopped
with no clear reason
PROBABLE
CAUSE
Problem with outdoor
electronics or
outdoor fan
Electronics or power
connection to RV
Refrigerant leakCheCN refrigeration system.
EEV problemCheCN EEV
Control problem or
refrigeration system
problem
CORRECTIVE ACTION
CheCN outdoor fan motor according
to the procedure in section 12.5.3 , if
not OK replace controller
CheCN RV power connections, if
OK,
CheCN RV operation with direct
230VAC power supply, if OK,
Replace outdoor controller.
Perform diagnostics (See 12.3), and
follow the actions described.
13
14
15
16
Compressor motor is
generating noise and no
suction occurs
Water leakage from indoor
unit
Freezing of outdoor unit in
heat mode and outdoor unit
base is bloCNed with ice
Unit operates with wrong fan
speeds or wrong frequency
Phase order to
compressor is wrong
Indoor unit drainage
tube is bloCNed
Wrong jumper
settings
CheCN compressor phase order.
CheCN and open drainage tube.
Connect base heater.
Perform diagnostics (See 12.3),
and cheCN if units is operating by
EEPROM parameters.
12.2 CheCNing the refrigeration system
CheCNing system pressures and other thermodynamic measures should be done when
system is in Test Mode (in Test mode, system operates in fixed settings). The performance
curves given in this manual are given for unit performance in test mode when high indoor fan
speed is selected.
Entering test mode:
Set unit to Cool/16 degrees/High indoor fan speed, or Heat/30 degrees/High indoor fan speed,
and enter diagnostics.
12.3 Judgment by Indoor/Outdoor Unit Diagnostics
12-2
Enter diagnostics mode - press for five seconds Mode button in any operation mode.
ACNnowledgment is by 3 short beeps and lights of COOL and HEAT LED’s. Then, every short
pressing of Mode button will scroll between Indoor and Outdoor unit diagnostic modes by the
aCNnowledgment of 3 short beeps and lighting of COOL and HEAT LED’s.
During the Outdoor unit diagnostics all four Indoor LED’s (STBY, Operate, Filter and Timer)
are blinking. When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter and
Timer) are ON.
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When system enters diagnostics mode, only one fault code is shown. Order of priority is from
the lower to the higher number. Diagnostics is continuously ON as long as power is ON. The
current system operation mode will not be changed.
If no fault occurred in the system, no fault code will be displayed during normal operation
mode. The last fault code will be displayed even if the system has recovered from that
fault. The last fault will be deleted from the EEPROM after the system has exit diagnostics
mode.
In diagnostics mode, system fault / status will be indicated by blinking of Heat & Cool LEDs.
The coding method will be as follows:
Heat LED will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool
LED will blink during the same 5 seconds according to the following Indoor / Outdoor unit
tables:
Note: 0 – OFF, 1-ON
12.3.1 Indoor Unit Diagnostics
● Alarm Output
The Alarm Output dry contact will be on (closed), when a predefined set faults occur.
The fault set is defined under diagnostics section.
The alarm output will be off (open), when the predefined fault is cleared.
The indoor alarm outputs are defined according to the following table:
NoProblemAO54321
1ICT is disconnectedYes00001
2ICT is shortedYes00010
3RAT is disconnectedYes00011
4RAT is shortedYes00100
5Reserved (for MSMP used as RGT fault)No00101
28Model ANo11100
29Model BNo11101
30Model C No11110
31Model DNo11111
* CN / LSN Units only
12.3.2 Indoor Unit Diagnostics and Corrective Actions
No.FaultProbable CauseCorrective Action
1
2
3
4No Encoder
5
6
7Bad EEPROM
8
9
Sensor failures
of all types
Communication
mismatch
No
Communication
Outdoor Unit
Fault
EEPROM Not
Updated
Bad
Communication
Using EEPROM
data
Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
Indoor electronics or
motor
Outdoor controller
problem
System is using ROM
parameters and not
EEPROM parameters
Communication quality
is low reliability
No problem. System is
using EEPRRRROM
parameters
CheCN sensor connections or
replace sensor
Replace Indoor controller
CheCN Indoor to Outdoor
wiring and grounding
CheCN motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
Switch to Outdoor
diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
CheCN Indoor to Outdoor
wiring and grounding
12.3.3 Outdoor Unit Diagnostics
The outdoor alarm outputs are defined in the following way:
NoProblemAO54321
12-4
1OCT is disconnectedYes00001
2OCT is shortedYes00010
3CTT is disconnectedYes00011
4CTT is shortedYes00100
5HST is disconnected (when enabled)Yes00101
6HST is shorted (when enabled)Yes00110
7OAT is disconnected (when enabled)Yes00111
8OAT is shorted (when enabled)Yes01000
9OMT is disconnected (DCI72 / 72Z / 80)Yes01001
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NoProblemAO54321
10OMT is shorted (DCI72 / 72Z / 80)Yes01010
11IPM FaultYes01011
12Bad EEPROMNo01100
13DC under voltageYes01101
14DC over voltageYes01110
15AC under voltage Yes01111
16Mismatch IDU & ODU models
17No CommunicationYes10001
18Reserved No10010
20Heat sink Over HeatingNo10100
21DeicingNo10101
22Compressor Over HeatingNo10110
23Compressor Over CurrentNo10111
24No OFAN FeedbaCNNo11000
25OFAN loCNedYes11001
26Compressor LoCNYes11010
27Bad CommunicationNo1101 1
28Missing ODU configuration
29Undefined ODU Model
30For future useNo11110
31Operation condition is exceeded
(*SW 35V14 and above)Yes11101
(*SW 35V14 and above)Yes10000
(*SW 35V14 and above)Yes11100
(*SW 35V14 and above)Yes11111
*Alarm Output - is on SW 35V14 and above. There is no alarm on SW 35V12 and below/
12.3.4 Outdoor Unit Diagnostics and Corrective Actions
No.FaultProbable CauseCorrective Action
1
Sensors failures of all
types
2IPM FaultElectronics HW problem
3Bad EEPROM
4DC under/over VoltageElectronics HW problem
5AC under Voltage
Indoor / Outdoor unit
6
Communication mismatch
Indoor and Outdoor
controllers are with
different versions
Communication or
7No Communication
grounding wiring is not
good.
CheCN sensors connections
or replace sensors.
CheCN all wiring and jumper
settings, if OK, replace
electronics.
No action, unless special
parameters are required for
unit operation.
CheCN outdoor unit power
supply voltage
CheCN outdoor unit power
supply voltage
Replace Indoor controller
CheCN Indoor to Outdoor
wiring and grounding
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CONTENT
No.FaultProbable CauseCorrective Action
Switch unit to STBY and
restart
If still not ok cheCN
8Compressor LoCN
compressor (12.5.4)
If comp is ok replace OU
controller
If compressor is not ok replace
compressor
9Bad Communication
Communication quality
is low reliability
CheCN Indoor to Outdoor
wiring and grounding
12.4 Judgment by MegaTool
MegaTool is a special tool to monitor the system states.
Using MegaTool requires:
•A computer with RS232C port.
•A connection wire for MegaTool.
•A special MegaTool software.
Use MegaTool according to following procedure:
•Setup MegaTool software: copy the software to the computer.
•Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by
the connection wire.
• Run the software and choose the COM port, you can monitor the A/C system state in
monitor tab.
12.5 Simple procedures for cheCNing the Main Parts
12.5.1 CheCNing Mains Voltage.
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this
range, abnormal operation of the system is expected. If in range cheCN the Power (Circuit)
Breaker and look for broken or loosed cable lugs or wiring mistake(s).
12.5.2 CheCNing Power Input.
If Indoor unit power LED is unlighted, power down the system and cheCN the fuse of the
Indoor unit. If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace
the fuse and power up again.
CheCNing Power Input procedure for the Outdoor unit is the same as with the Indoor unit.
12.5.3 CheCNing the Outdoor Fan Motor.
Enter Test Mode (where the OFAN speed is high)
CheCN the voltage between lead wires according to the normal value as following:
•Between red wire and blaCN wire: 310VDC +/- 20V
•Between orange wire and blaCN wire: 15VDC +/- 1V
•Between yellow wire and blaCN wire: 2-6VDC
12-6
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12.5.4 CheCNing the Compressor.
The compressor is brushless permanence magnetic DC motor. Three coil resistance is same.
CheCN the resistance between three poles. The normal value should be below 0.5 ohm
(TBD).
12.5.5 CheCNing the Reverse Valve (RV).
Running in heating mode, cheCN the voltage between two pins of reverse valve connector,
normal voltage is 220VAC.
12.5.6 CheCNing the electrical expansion valve (EEV).
The EEV has two parts, drive part and valve. The drive part is a step motor; it is ringed on the
valve. CheCN the drive voltage (12VDC). When Outdoor unit is power on, EEV shall run and
have cliCN and vibration.
12.6 Precaution, Advise and Notice Items
12.6.1 High voltage in Outdoor unit controller.
Whole controller, including the wires that are connected to the Outdoor unit controller may
have the potential hazard voltage when power is on. Touching the Outdoor unit controller may
cause an electrical shoCN.
Advise: Don’t touch the naked lead wire and don’t insert finger, conductor or anything else into
the controller when power is on.
12.6.2 Charged Capacitors
Three large-capacity electrolytic capacitors are used in the Outdoor unit controller. Therefore,
charging voltage (380VDC) remains after power down. Discharging takes about four minutes
after power is off. Touching the Outdoor unit controller before discharging may cause an
electrical shoCN.
12.6.3 Additional advises
• When disassemble the controller or the front panel, turn off the power supply.
• When connecting or disconnecting the connectors on the PCB, hold the whole housing,
don’t pull the wire.
w
• There are sharp fringes and sting on shell. Use gloves when disassemble the A/C units.