Indoor Units
Outdoor Units
Please Read Before Starting
Check of Density Limit
Contents
Trouble Diagnosis
Control Functions
Required settings for Test Run
Introduction
Outdoor unit No.1
Outdoor Unit Stop Rules
Delayed Start of Outdoor Units
Selecting an Outdoor Unit for Operation
Outdoor Unit Operating Rules
Type
Compressor Control
Compressor Selection Rules
Capacity
Roadmap Control
Compressor Capacity Control
Inverter Compressor Capacity Control
Forced Compressor Stop
Compressor Control
Protection control
Roadmap Control after Trip
Start of System Refrigerant Oil Recovery Control
Way Valve Adjustment Control
System Refrigerant Oil Recovery Control
System refrigerant oil recovery cycle
Constraint conditions
Refrigerant Oil Recovery Control between Systems
Defrost Control
Defrost Methods
Outdoor units where defrost occurs
Frost detection
Reverse Cycle Defrost
OFF
Outdoor unit cycle defrost
System defrost end
Defrost end judgment conditions
Oil Control
Other Controls
Operation of Solenoid Valves
Refrigerant Control Valve RCV
Refrigerant Balance Valve RBV Gas Purge Valve
Bypass Valve BPV
Recovery Valve Orvr
Power Initialization
Types of Electronic Thermostatic Expansion Valves
CHDX07263, CHDX09663
SC Circuit Electronic Control Valve MOV4
Outdoor Fan Control
Demand Control
Demand setting Control Demand meaning
Heating operation
Indoor Unit Control of the Electronic Control Valve
Normal Control
Cooling operation
Special Control
Gas tube valve Electronic thermostatic Expansion valve
Rap Valve Kit Control
Indoor Unit Refrigerant Oil Self Recovery Control
Compressor No
Discharge Temperature
Discharge temperature protection list
Discharge sensor failure list
Current Protection
Pressure Sensor Failure
Backup Operation
Automatic Backup Operation
Manual Backup
S010 switch
S010 Compressor 1 backup
Compressor 2 backup
Setting Description
Service Maintenance Functions
This setting controls the operation of the drain pump
Setting Max. fan mode Effect Amount of capacity reduction
Speed
Setting Operation
Setting No Compatible static pressure psi
Set at outdoor units that include CCU functions
Snowfall Sensor Functions Outdoor Eeprom
Other Functions
Outdoor unit PCB LED indications in judgment mode
Symptoms of insufficient gas
Symptoms of overcharge
Memo
Outdoor Unit Repair Procedures
Removing Panels
Procedures
Removing Electrical Component Box and Duct
Remove the upper duct remove 3 screws Fig
Remove the lower duct remove 2 screws, and a hook
Checking the Oil
Discharging Compressor Oil
Discharging Oil from Oil Separator
Discharging Oil in Compressor
If the failed outdoor unit is not the No unit
Automatic Backup
Backup operation by disconnecting the outdoor unit
Switch on outdoor unit control PCB Action
If the failed unit is the No outdoor unit main unit
INV compressor AC1 compressor Setting for backup operation
Backup operation settings for each compressor
Following equipment and tools are required
Recovering Refrigerant
Refrigerant Recovery Procedures from outdoor unit
Carry out refrigerant recovery
Cooling operation for all units
Refrigerant Recovery Procedures Indoor Unit
Unit
Recovering Refrigerant
Recovery of Refrigerant from Entire System
Pressure Check for Leakage of Outdoor Unit
Checking for Leakage After Repair
Evacuating Repaired Outdoor Unit
Evacuating System
If Refrigerant Has Already Been Charged to Outdoor Unit
Charging Compressor Oil
DPR
If Outdoor Unit Has Not Been Charged with Refrigerant
JT160G-KTTJ
Pumping Out Refrigerant from Outdoor Unit
Pumping Out Refrigerant from Outdoor Unit
Faulty outdoor unit Other outdoor unit
Refrigerant recovery unit
Compressor Trouble Diagnosis and Check Methods
Compressor
Compressor
Replacing all compressors in a failed unit
Replacing all compressors in a system
If a ball valve is installed on the outdoor unit
Dry core cleaning
Cleaning dry core
If a ball valve is not installed on the outdoor unit
Removing and Installing Compressors
Replacing compressors
Removal
Installation
Front view Type
Compressor
Compressor
Replacing multiple compressors Removal
Installing the High and Low Pressure Sensors
High and Low Pressure Sensors
Removing the High and Low Pressure Sensor
Protect the check valves as shown in the figure
Replacing 4-way Valve
Replacing 4-way Valve
Memo
Outdoor Unit Maintenance Remote Controller
Overview
NN About the outdoor unit maintenance remote controller
Service Checker Section
System diagram
Functions
NN Temperature monitor
NN Outdoor unit alarm history monitor
NN Mode settings
NN Functions on the ordinary display
Double-speed
All units start/stop Fig
Cooling/heating change Fig
All units test run Fig
Item code Remarks
NN Display functions
Sample displays
Locations where , , and are displayed as shown in Fig
Display of unit Nos −
Meaning of display colon
Is not displayed
Monitoring Operations
Indoor unit
NN Display of unit No main unit
Operating procedure
Outdoor Unit Alarm History Monitor
B are displayed alternately
Mode Settings
Setting mode 1 Operating procedure
Display of first 4 digits Display of last 4 digits
List of Item Codes
Setting mode 2 Operating procedure
Memo
Remote Controller Functions
Simple Settings Function
Procedure
Remote Controller Functions Section
Item code Setting data Description
List of Simple Setting Items
Detailed Settings Function
Setting data Item code Description
List of Detailed Setting Items
Minutes
No forced operation
DC fan tap operating Purpose Mode
Filter sign on times for each model
Simple setting items
Explanation of operation mode priority change
Enabled only in 2WAY Multi heat-pump models
Function
Cooling or dry Heating Fan Fan not changed
Detailed Settings Function
Setting range Drying
From previous
List of Servicing Functions
Remote Controller Servicing Functions
Procedure
Test Run Function
Operates the unit with the thermostat forced on
Procedure
Outdoor unit sensors
Trouble Diagnosis
Contents of Remote Controller Switch Alarm Display
Possible cause of malfunction Operation
Outdoor Unit Control Panel LED Display
Blinking OFF
Display meaning
Example Unit No Item code sensor address Discharge temp. TD
Check procedure
Sensor Temperature Relationship Table
Alarm code Alarm meaning
2WAY ECO-i Alarm Codes
2WAY ECO-i Alarm Codes
S004 S005
E06 Alarm Alarm code
E12 Alarm Alarm code
E15 Alarm Alarm code
CN001
E16 Alarm Alarm code
E20 Alarm Alarm code
E24 Alarm Alarm code
E25 Alarm Alarm code
E26 Alarm Alarm code
E29 Alarm Alarm code
F04, F05 Alarm Alarm code
F07, F24 Alarm Alarm code
F06, F23 Alarm Alarm code
F12 Alarm Alarm code
F08 Alarm Alarm code
F16 Alarm Alarm code
F31 Alarm Alarm code
F17 Alarm Alarm code
H11, H12 Alarm Alarm code
H15 Alarm Alarm code
H03, H13 Alarm Alarm code
Which may damage the compressor
H06 Alarm Alarm code
H07 Alarm Alarm code
H31 Alarm Alarm code
H08, H27 Alarm Alarm code
L18 Alarm Alarm code
L04 Alarm Alarm code
L10 Alarm Alarm code
L17 Alarm Alarm code
P03, P17 Alarm Alarm code
P05 Alarm Alarm code
P04 Alarm Alarm code
P16 Alarm Alarm code
P22 Alarm Alarm code
Fan circuit on the outdoor unit control PCB
Alarm code Blinking inspection display
Blinking inspection display 1 Automatic backup
P26 Alarm Alarm code
P29 Alarm Alarm code
Alarm meaning Compressor magnet SW seizing detected
Blinking Inspection Display on the Remote Controller
Inspection of Parts
Output Operation
Test Pin
Thermister Characteristics Curve
Room temp.sensor
Indoor heat exch. coil sensor E1, E3
Compressor discharge gas temp. sensor
Memo
Service hvac.service@sna.sanyo.com 201002