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