Service Handbook
Page
Contents
Carefully read the labels affixed to the main unit
Safety precautions
Do not use the existing refrigerant piping
Be especially careful when managing the tools
Use liquid refrigerant to seal the system
Use a vacuum pump with a reverse flow check valve
Storage of Piping Material
Reason
Piping Machining
Brazing
When non-oxide brazing was used
Items to be strictly observed
Reasons
R22 leakage detector
Airtightness Test
Vacuuming
Dryer
Charging of Refrigerant
Cylinder color identification R407C-Gray
R410A-Pink
P400 Type P500 Type
Appearance of Components
Outdoor unit PURY-P400·500YMF-C
Noise filter Magnetic contactor 52C1 Capacitor C2, C3 52F
Controller Box
51C2 Module IPM Board
Puhy / Pury
Main board
INV board
Board
Fancon board
Cnpow Cnfan CNFC2
CNE CNDC1
SNB board Board
Cntr
BC controller
SW4 SW5 SW2 SW1
Earth
Relay 10 board Relay 4 board
SV8 SV7
ACC
LEV3 SVM2
CMB-P108, 1010, 1013, 1016V-FA
PS3
LEV1 SVM1
TH22
LEV3a
TH25
PURY-P400·500YMF-C
Electrical Wiring Diagram
SV7B SV7A SV7C SV8B SV8A SV8C
CMB-P108·1010V-FA
CMB-P1013·1016V-FA
Symbol
LEV3
CMB-P108V-FB
Cooling operation
Standard Operation Data
PURY-P400YMF-C PURY-P500YMF-C
DB/WB
Heating operation
Function of Dip SW and Rotary SW
Ture Power is on Defrosting end tempera
SWU
SW3
Indoor unit DIP SW1
SW2 setting
P40 P50 P63
Model P71 P80 P100 P125 P140
Function
220V 240V
SW4
Connected indoor units Can be connected without a RP
Before Test Run
Check points before test run
Local remote controller displays code No
Check points for test run when mounting options
Built-in optional parts
Insulation pipe
Not heat at heating
Check points for system structure
Portion
CN40 on the Main board when the system is centralized
Error stop, compressor trouble
Turn on power source 12 hours before starting operations?
Example, 200m or less total length 500m at the farthest
Warm or cold air is blowing out
Test Run Method
Filter +
Switch function
Controlled
Test RUN
Description of registration/deletion/retrieval
Attribute display of unit
Group registration of indoor unit
Registration procedure
Press the switch for confirmation E
Operation procedure
Switch G for the interlocked setting mode. See figure below
No registration
Deletion completed Case of group re
Press the switch for confirmation F twice continuously
Deletion of address not existing
Initial processing
Control of Outdoor Unit 1- 1 PURY-P400·500 YMF-C
Control at staring
Compressor capacity control
SV6a
Bypass capacity control
Stop
OFF
SV1
Defrosting control
Oil return control Electronic expansion valve Slev
Judgement and control of refrigerant amount
Control of liquid level detecting heater
Heat exchanger TH9
Four-way valve
Accumulator CS circuit
Outdoor unit heat exchanger capacity control
Control at initial starting
Start of initial operation mode Step
Example Minutes
Initial start control timing chart
End of initial operation mode 5 minutes Example
400 500 No Compressor Failure 48 % 65 %
Emergency response operating mode
Control of SVA, SVB and SVC
Control of BC Controller
Control of SVM1 only FA type
Control of LEV
Normal operations Trouble observed Stop
Operation Flow Chart
Outdoor unit
BC controller
Operation No command
Start
Normal operations
Indoor unit
Normal operations Test run Stop
Cooling operation
Cooling operation Way valve OFF Indoor unit fan Operations
Test run start Thermostat on
Normal operations Defrosting operations Stop Test run
Heating operation
Thermostat on
Dry operation
Thermostat on Inlet temp ˚C
Same as those in cooling operations
MC2
List of Major Component Functions
MC1
TH4
TH3
TH5
TH6
CH3
CH2
Resistance of Temperature Sensor
Adjustment and Judgement of Refrigerant Amount
Operating Characteristics and Refrigerant Amount
Low temperature than overload Control system Temperature
Symptom
PURY-P400YMF-C PURY-P500YMF-C
Refrigerant Volume
Additional Refrigerant Charge Volume
Procedure
Refrigerant Volume Adjustment Mode Operation
TH1
SC11 SC16
Adjustment starts
SW1 OFF
Turn all of switches Readjust
YES
18 kg 27 kg 31 kg
Pipe Length Or less 60 ~ 90 m
Principal Parts
Connector GND Black Vout White Vcc DC5V Red
Pressure Sensor
Judging Failure
SW1
Solenoid Valve SV1~8
LED
SV3 SV4 SV5 SV6
Solenoid Valves Block1
SV8 CV7b
Solenoid Valves Block
CV5b
CV4b
Check Valves Block1
Check Valves Block2
CV5b CV4b CV2b CV3b
Check Valves Block2
CV6b
LEV Valve Closing and Valve Opening Operations
Outdoor LEV
Temperature is considerably low
Temperature sensed by Thermistor liquid pipe temperature
Compared to the remote control’s
Intake temperature display, it can
Part a
Diode stack
Intelligent Power Module IPM
Tester ⊕
10~50 Ω Tester
After checking , if these are factors
Check method and handling
Check voltage between a and B
NET transmission line break on the side of the room unit
Power terminal block Voltage Verify the power
Unit is removed
Phenomena
Main board ----CNS1, CNVCC3
INV board----CNAC2, CNVCC1, CNL2
30V Check Procedure
Case of M-NET remote controller
No powering signal INV board
CNS1, CNVCC3
Checking method & countermeasure Case Melans is not used
Transmission line Wiring miss Door unit M-NET 17 ~ 30V?
Normal in case of 10V ~
Melans
CNR, CNAC2
Investigation of transmission wave shape/noise
Method
Forwiring
Checking
Earthing
If the problem is solved and you connect
Disconnected wires should Insulation resistance 2MΩ or more
Again, replace the compressor
Vidual Parts Failure Judgment Methods
TB1B~CNPOW, CNFAN~CN04~CNMF
TB1A~NF~TB1B~CNTR1~T01~CNTR
CNFAN~52F~CN05~CNMF
CNFC1~CNFC2
IPM
20~60Ω AC Current sensor Acct
A1-A2
Black Capacitor C2,C3 Board Red
Motor Compressor Red White Black
Pressure sensor Pressure sensor troubleshooting flow
Troubleshooting the major components of the BC controller
Start
OK?
HPS
Problem No abnormality
Temperature Sensor Thermistor troubleshooting flow
Resistance value Thermistor R o=15 k Ω Rt=15exp 273+t
Temperature sensor resistance graph
Temperature ˚C
LEV, Solenoid Valve Troubleshooting Flow
LEV
Intermediate subcool BC controller liquid
Subcool Solenoid Valve Troubleshooting Flow
Output superheat BC controller
Solenoid Valve
Disconnect the connector before measurement
SVM is turned on and off in accordance with operation mode
SVM1
Normal Malfunction
Control Box
BC Controller Disassembly Procedure
Service panel
Be careful when removing heavy parts Procedure
Thermistor Liquid and gas piping temperature detection
100
Ler panel TH11 TH12 CN10 TH15, TH16 CN11
LEV
101
Solenoid Valve Coil
LEV3 LEV1
102
103
CNAC2 TB1B
Mechanical
CNRS2 CNRS3
105
SVM1 LEV3
106
LEV3 SVM BC
LEV3 SVM SVA BC
107
SVA SV3~8
108
LEV3 SVM
Slev
109
Once vacuum operation protection is
110
Indoor and outdoor units by oper
2502 Drain pump
T01~CNTR
111
TB1A~NF~TB1B~CNTR1~F3~
TB1A~NF~TB1B, TB1B~DS~52C
112
VDC
MF1~CNFAN
113
114
TH HS
115
Thhs TH5
TH8
IPM-MC1
116
CNDR2-CNDR1
117
On, the wave shape is changed and the error is detected
Error
118
Communication/system
119
Checking method and processing Error
Transmission circuit bus-busy er
→ Noise if existed, check the noise
120
Communication trouble between Faulty generating controller
Remote No reply Faulty transmission wiring at IC unit side
Shut down OC unit power source,
Generating Display Detecting
More, and make them again
122
123
124
125
System error
126
LED Monitor Display
How to read LED for service monitor
127
Comp
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8
128
Comp COMP1
TH2 TH3 TH4 TH5 TH6 TH7
129
130
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8
131
132
IC16SC
133
134
135
136
137
IC24SH
138
IC24SC
139
140
141
SC16 LED monitor switch
Location of leaks Outdoor unit Cooling mode
Stop all indoor units and the compressor
Check that all indoor units have been stopped
Location of leaks Outdoor unit when heating
144
LPS
145
Service Handbook PURY-P400, P500YMF-C