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Sanyo 2-WAY ECO-i SPW-C0705DXHN8 Service Manual

Sanyo 2-WAY ECO-i SPW-C0705DXHN8 Service Manual

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SERVICE MANUAL
Outdoor Unit
Class
70
SPW-C0705DXHN8
C
Model Name
SPW-C0705DXHN8R
Indoor Unit
Class
7
SPW-
4-Way Air Discharge
X
XDR74GXH56(A/B)
Semi-Concealed
X075XH
4-Way Air Discharge
SPW-
XM
Semi-Concealed
XM075XH
2-Way Air Discharge
SPW-
S
Semi-Concealed
SR74GXH56(A/B)
1-Way Air Discharge
SPW-
A
Semi-Concealed
ADR74GXH56B
1-Way Air Discharge
L
Semi-Concealed Slim
SPW-
UR74GXH56(A/B)
U
Concealed-Duct
U075XH
UR74SXH56B
SPW-
US
Concealed-Duct
US075XH
T
Ceiling-Mounted
SPW-
K
Wall-Mounted
KR74GXH56(A/B)
K075XH
SPW-
FM
Concealed Floor Standing
FMR74GXH56(A/B)
SPW-
F
Floor Standing
FR74GXH56(A/B)
Total Heat Exchanger
GU
with DX coil
Class
25
Concealed-Duct
SPW-
D
High-Static Pressure
DR254GXH56(A/B)
85464849263000
90
115
SPW-C0905DXHN8
SPW-C1155DXHN8
SPW-C0905DXHN8R
SPW-C1155DXHN8R
9
12
16
SPW-
SPW-
SPW-
XDR94GXH56(A/B)
XDR124GXH56(A/B)
XDR164GXH56(A/B)
X095XH
X125XH
X165XH
SPW-
SPW-
SPW-
XM095XH
XM125XH
XM165XH
SPW-
SPW-
SPW-
SR94GXH56(A/B)
SR124GXH56(A/B)
SR164GXH56(A/B)
SPW-
SPW-
ADR94GXH56B
ADR124GXH56B
SPW-
SPW-
SPW-
LDR94GXH56(A/B)
LDR124GXH56(A/B)
LDR164GXH56(A/B)
SPW-
SPW-
SPW-
UR94GXH56(A/B)
UR124GXH56(A/B)
UR164GXH56(A/B)
U095XH
U125XH
U165XH
UR94SXH56B
UR124SXH56B
UR164SXH56B
SPW-
SPW-
SPW-
US095XH
US125XH
US165XH
SPW-
SPW-
TDR124GXH56(A/B)
TDR164GXH56(A/B)
T125XH
T165XH
SPW-
SPW-
SPW-
KR94GXH56(A/B)
KR124GXH56(A/B)
KR164GXH56(A/B)
K095XH
K125XH
SPW-
SPW-
SPW-
FMR94GXH56(A/B)
FMR124GXH56(A/B)
FMR164GXH56(A/B)
SPW-
SPW-
SPW-
FR94GXH56(A/B)
FR124GXH56(A/B)
FR164GXH56(A/B)
SPW-
SPW-
GU055XH
GU075XH
36
48
76
SPW-
SPW-
SPW-
DR364GXH56(A/B)
DR484GXH56(A/B)
DR764GXH56(A/B)
2-WAY ECO-i
MULTI SYSTEM
130
140
SPW-C1305DXHN8
SPW-C1405DXHN8
SPW-C1305DXHN8R
SPW-C1405DXHN8R
18
25
SPW-
SPW-
XDR184GXH56(A/B)
XDR254GXH56(A/B)
X185XH
X255XH
SPW-
XM185XH
SPW-
SPW-
SR184GXH56(A/B)
SR254GXH56(A/B)
SPW-
SPW-
LDR184GXH56(A/B)
LDR254GXH56(A/B)
SPW-
SPW-
UR184GXH56(A/B)
UR254GXH56(A/B)
SPW-
U185XH
U255XH
UR304SXH56B
UR184SXH56B
UR254SXH56B
SPW-
US185XH
SPW-
SPW-
TDR184GXH56(A/B)
TDR254GXH56(A/B)
T185XH
T255XH
SPW-
SPW-
KR184GXH56(A/B)
KR254GXH56(A/B)
SPW-
SPW-
FMR184GXH56(A/B)
FMR254GXH56(A/B)
SPW-
SPW-
FR184GXH56(A/B)
FR254GXH56(A/B)
SPW-
GU105XH
96
SPW-
DR964GXH56(A/B)
30
36
48
SPW-
SPW-
XDR364GXH56(A/B)
XDR484GXH56(A/B)
X365XH
X485XH
SPW-
SPW-
UR364GXH56(A/B)
UR484GXH56(A/B)
U365XH
U485XH
UR364SXH56B
UR484SXH56B
SPW-
SPW-
TDR364GXH56(A/B)
TDR484GXH56(A/B)
T365XH
T485XH
SM830163-00
REFERENCE NO.
60
SPW-
XDR604GXH56(A/B)
X605XH
SPW-
UR604GXH56(A/B)
U605XH
UR604SXH56B

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Summary of Contents for Sanyo 2-WAY ECO-i SPW-C0705DXHN8

  • Page 1 SERVICE MANUAL 2-WAY ECO-i MULTI SYSTEM Outdoor Unit Class SPW-C0705DXHN8 SPW-C0905DXHN8 SPW-C1155DXHN8 SPW-C1305DXHN8 SPW-C1405DXHN8 Model Name SPW-C0705DXHN8R SPW-C0905DXHN8R SPW-C1155DXHN8R SPW-C1305DXHN8R SPW-C1405DXHN8R Indoor Unit Class SPW- SPW- SPW- SPW- SPW- SPW- SPW- SPW- SPW- 4-Way Air Discharge XDR74GXH56(A/B) XDR94GXH56(A/B) XDR124GXH56(A/B) XDR164GXH56(A/B) XDR184GXH56(A/B) XDR254GXH56(A/B) XDR364GXH56(A/B)
  • Page 4 — CONTENTS — Section 1: CONTROL FUNCTIONS ......... . 1-1 Introduction .
  • Page 5 Section 5: TROUBLE DIAGNOSIS ......... . 5-1 Contents of Remote Controller Switch Alarm Display .
  • Page 6 W-2WAY ECO-i SYSTEM Control Functions 1. CONTROL FUNCTIONS 1. Introduction ............1-2 2.
  • Page 7 W-2WAY ECO-i SYSTEM 1. Introduction Control Functions The W-2WAY ECO-i is a system that allows multiple outdoor units to be connected. The outdoor units all contain inverter compressors, and the system does not utilize the sub units that were used in earlier systems. The outdoor unit where the unit No.
  • Page 8 W-2WAY ECO-i SYSTEM 2. Selecting an Outdoor Unit for Operation Control Functions 2-1. Outdoor Unit Operating Rules Because in this system all outdoor units contain an inverter compressor, ordinarily there is no absolute order of pri- ority for compressor operation. Therefore there is no order of priority for the outdoor units. However, it is possible to operate the outdoor units in sequence, beginning with unit No.
  • Page 9 W-2WAY ECO-i SYSTEM 3. Compressor Control Control Functions 3-1. Compressors Mounted in the Outdoor Units [SPW-C0705DXHN8, C0905DXHN8, C1155DXHN8, C1305DXHN8, C1405DXHN8] 705* 1155 1305 1405 Capacity DC Inverter DC Inverter DC Inverter DC Inverter DC Inverter Compressor 1 Rotary Installed Compressor 2 Scroll –––...
  • Page 10 W-2WAY ECO-i SYSTEM 3. Compressor Control Control Functions Compressor Selection Sequence in Heating Mode: First, the inverter compressor with the shortest amount of operating time is selected. And then, the remained other compressors are selected and start in the order of shortest amount of operating time. ODU 1 ODU 2 OUD 3...
  • Page 11 W-2WAY ECO-i SYSTEM 3. Compressor Control Control Functions 3-6-1. Evaporation Temperature (Te) Control: Control of Indoor Units Operating in Cooling Mode 16.0 Horsepower increase 12.0 permitted 11.1 Area A 11.0 11.0 Horsepower increase Area AB permitted Horsepower increase Area B prohibited Horsepower decrease Area C...
  • Page 12 W-2WAY ECO-i SYSTEM 3. Compressor Control Control Functions 3-6-2. Condensation Temperature (Tc) Control: Control of Indoor Units Operating either in Cooling Mode or Heating Mode Thermostat OFF Area D PX –0.1 Area C Horsepower decrease 48.1 48.0 48.0 Horsepower increase Area B prohibited 47.0...
  • Page 13 W-2WAY ECO-i SYSTEM 3. Compressor Control Control Functions (2) Current Protection Inverter compressor current control is composed of primary current control and secondary current control. Cur- rent protection control for the inverter compressor is performed by self-protection in the inverter circuit, and does not increase or decrease the compressor capacity.
  • Page 14 W-2WAY ECO-i SYSTEM 4. Special Controls Control Functions In addition to ordinary heating and cooling operation, this system also includes the following 3 types of special con- trols for control of the system as a whole. 1. 4-way Valve Adjustment Control 2.
  • Page 15 W-2WAY ECO-i SYSTEM 4. Special Controls Control Functions 4-2-3. Refrigerant Oil Recovery Control between Systems (1) Simplified flow of system refrigerant oil recovery control Refrigerant oil recovery control between systems shall be performed as the flow mentioned below. Normal operation → 3-minute stop → Refrigerant oil recovery control between systems (Max. 3 minutes) → 3- minute stop →...
  • Page 16 W-2WAY ECO-i SYSTEM 4. Special Controls Control Functions 4-3-3. Frost detection (A) Frost detection does not occur for 5 minutes after operation starts. (B) Frost is detected when either condition 1 or 2 below is met. Condition 1: L2 line or below is detected twice, each time continuously for 4 minutes, when the compressor is operating.
  • Page 17 W-2WAY ECO-i SYSTEM 4. Special Controls Control Functions 4-3-6. Outdoor unit cycle defrost Outdoor unit cycle defrost is performed in systems where 2 or more outdoor units are connected to the refrigerant system. (1) Description of outdoor unit cycle defrost With this defrost method, when 1 outdoor unit operates in defrost mode (heat exchanger operating as a con- denser), another outdoor unit operates as an evaporator in the same way as in ordinary heating mode.
  • Page 18 W-2WAY ECO-i SYSTEM 4. Special Controls Control Functions 4-3-7. Defrost end judgment conditions Defrost ends when either of the below defrost end judgment conditions is met. Condition 1: The temperatures are 10°C or higher at all temperatures sensors installed on the outdoor unit heat exchanger coils.
  • Page 19 W-2WAY ECO-i SYSTEM 5. Other Controls Control Functions 5-1. Oil Control 5-1-1. Oil level Oil level Meaning Conditions of oil Judgement The compressor contains oil more than There is no problem. the oil level which is necessary and Sufficient sufficient for normal operation. The compressor contains sufficient oil Confirm that oil is returned after but there is a possibility of shortage...
  • Page 20 W-2WAY ECO-i SYSTEM 6. Operation of Solenoid Valves Control Functions 6-1. Refrigerant Control Valve [RCV] The main purpose of this valve is to detect the flow of refrigerant (refrigerant volume) on the indoor-unit side when the outdoor unit heat exchanger is functioning as a condenser. When the valve determines that there are signs of a low refrigerant level, refrigerant is supplied from the receiver tank to the system.
  • Page 21 W-2WAY ECO-i SYSTEM 6. Operation of Solenoid Valves Control Functions 6-3. Recovery Valve (ORVR) This valve recovers refrigerant oil from the balance tube to the compressor. (1) When unit is stopped This valve is always OFF. (2) When unit is operating (A) This valve turns ON when separator oil self-recovery control is in progress.
  • Page 22 W-2WAY ECO-i SYSTEM 7. Outdoor Unit Electronic Thermostatic Expansion Valves Control Functions [MOV1, MOV2 & MOV4] 7-1. Types of Electronic Thermostatic Expansion Valves [SPW-C0705DXHN8, C0905DXHN8, C1155DXHN8, C1305DXHN8, C1405DXHN8] Capacity 1155 1305 1405 Heat exchanger Heat exchanger Heat exchanger Heat exchanger Heat exchanger Electronic 1 valve...
  • Page 23 W-2WAY ECO-i SYSTEM 7. Outdoor Unit Electronic Thermostatic Expansion Valves Control Functions [MOV1, MOV2 & MOV4] 7-4. SC Circuit Electronic Control Valve [MOV4] (1) SC Control (Cooling Mode only) During cooling operation, the liquid refrigerant which condenses at the outdoor unit heat exchanger flows into the receiver tank, and SC (sub-cool = supercooling) approaches 0°C.
  • Page 24 W-2WAY ECO-i SYSTEM 8. Outdoor Fan Control Control Functions 8-1. Fan mode These outdoor units utilize a DC fan motor that can be controlled in a maximum of 16 steps (16 modes). However, fan modes 15 and 16 can only be used if high static-pressure mode has been set. * For information concerning EEPROM settings, refer to the field application functions.
  • Page 25 W-2WAY ECO-i SYSTEM 9. Demand Control Control Functions Serial-parallel I/O must be connected in order to perform demand control. The below input is received by serial- parallel I/O, and demand control is performed. The demand values can be set as needed with this device. For more information, refer to the field application func- tions.
  • Page 26 W-2WAY ECO-i SYSTEM 10. Indoor Unit Control of the Electronic Control Valve Control Functions 10-1. Normal Control (1) Cooling operation Position of electronic control valve Outdoor unit Outdoor unit operating stopped Stopped Thermostat Cooling Thermostat Performs SH control in the range of 55 – 480 –...
  • Page 27 W-2WAY ECO-i SYSTEM 10. Indoor Unit Control of the Electronic Control Valve Control Functions 10-2. Special Control Operating Control Subject indoor units Position of electronic control valve mode Fixed pulse for cooling, according to indoor unit 4-way valve Cooling All indoor units capacity adjustment control Heating...
  • Page 28 W-2WAY ECO-i SYSTEM 11. Rap Valve Kit Control Control Functions A gas tube valve kit may be connected to the Types D and GU indoor unit. When the gas tube valve kit is con- nected, operations of gas tube valve kit and indoor unit electronic thermostatic expansion valve are as shown in the table.
  • Page 29 W-2WAY ECO-i SYSTEM 12. Indoor Unit Refrigerant Oil Self Recovery Control Control Functions This control is carried out regularly in cooling mode only. (1) During stopped, fan or thermostat OFF condition, indoor unit expansion valve is opened regularly for 1 to 2 min- utes regularly (at an interval of once every 2 hours.) (2) During the thermostat ON, the indoor unit electronic thermostatic expansion valve is opened about 10 pulses from the current status.
  • Page 30 W-2WAY ECO-i SYSTEM 13. Discharge Temperature Control Functions <Alarm Information> (1) Discharge temperature protection alarm This device sets an upper limit discharge temperature of 106°C for all compressors. When the discharge tem- perature reaches 106°C, that compressor is stopped and restarted. If the same high discharge condition occurs 4 times, then an alarm occurs.
  • Page 31 W-2WAY ECO-i SYSTEM 14. Current Protection Control Functions (1) Fan motor Alarm Description Occurs when the fan motor detects overcurrent, or when the motor is locked and does not turn. (2) Inverter compressor Alarm Description Occurs during ordinary operation when overcurrent (27.0A) is detected. Occurs under the same conditions as P16 when the inverter compressor is operating at or above 80 Hz.
  • Page 32 W-2WAY ECO-i SYSTEM 15. Pressure Sensor Failure Control Functions This system contains 2 types of pressure sensors: a high-pressure sensor and a low-pressure sensor. (1) High-pressure sensor failure Alarms are emitted when the high-pressure sensor becomes an electrical open-circuit or a short-circuit condi- tions, and a broken wiring, short-circuit or poor connection to the PCB in the high-pressure sensor circuit.
  • Page 33 W-2WAY ECO-i SYSTEM 16. Backup Operation Control Functions <Field Application Functions> Backup Operation 16-1. Automatic Backup Operation This system includes a function for automatic backup operation. An alarm is also displayed to inform the operator that a failure has occurred. (1) Alarms that result in automatic backup operation When compressor trouble or fan motor trouble makes emergency continued operation impossible, automatic backup operation mode is engaged.
  • Page 34 W-2WAY ECO-i SYSTEM 16. Backup Operation Control Functions Outdoor unit hp 8 hp 10 hp 12 hp 14 hp 16 hp Switches to turn ON INV+BU INV+AC1+BU INV+AC1+BU INV+AC1+AC2+BU INV+AC1+AC2+BU (C) Close all service valves at the failed outdoor units. (D) Reset the power at outdoor unit No.1.
  • Page 35 W-2WAY ECO-i SYSTEM 17. Service Maintenance Functions Control Functions The outdoor unit EEPROM settings can be used for the following functions. 17-1. Outdoor Unit Noise Countermeasure: EEPROM 05 (set at each outdoor unit) This unit includes 3 types of Quiet modes. (However, when they are engaged, operation is in Quiet mode 24 hours a day.) Selecting a Quiet mode results in operation that gives priority to reducing noise.
  • Page 36 W-2WAY ECO-i SYSTEM 17. Service Maintenance Functions Control Functions 17-5. Optional Solenoid Valve Control Operation Setting: Outdoor EEPROM C0 (set at each outdoor unit) No output (setting at time of factory shipment) Refrigerant shut-off valve control (for cooling when the outdoor air temperature is below standard conditions) External liquid valve control (used in special cases when the discharge gas temperature is especially likely to rise) 17-6.
  • Page 37 W-2WAY ECO-i SYSTEM 18. Other Functions Control Functions 18-1. Snowfall Sensor Functions: Outdoor EEPROM 04 A unit identified as having a snowfall sensor attached will periodically send a signal indicating the snowfall sensor input status to all outdoor units in the same system (or all wired outdoor units in the case of linked systems). It is therefore unnecessary to install and wire multiple snowfall sensors.
  • Page 38 W-2WAY ECO-i SYSTEM 18. Other Functions Control Functions (3) Outdoor unit PCB LED indications in judgment mode Judgment items udgment mode Blinking Blinking Normal Insufficient gas Blinking harge with refrigerant a little at a time. Overcharge Blinking Recover refrigerant a little at a time. Judgment not Blinking alternately possible...
  • Page 39 W-2WAY ECO-i SYSTEM Outdoor Unit Repair Procedures 2. OUTDOOR UNIT REPAIR PROCEDURES 1. Removing Panels ............2-2 2.
  • Page 40 W-2WAY ECO-i SYSTEM 1. Removing Panels Outdoor Unit Repair Procedures Procedures: 1. Removing Panels 2. Removing Electrical Component Box and Duct 3. Discharging Compressor Oil 4. Backup Operation 5. Recovering Refrigerant 6. Checking for Leakage After Repair 7. Evacuating System 8.
  • Page 41 W-2WAY ECO-i SYSTEM 2. Removing Electrical Component Box and Duct Outdoor Unit Repair Procedures Be sure to turn off the power before removing the electrical component box. Then check that the power LED (D53) on the control PCB of the outdoor unit is not lit. (1) Remove the electrical component box cover (remove 6 screws).
  • Page 42 W-2WAY ECO-i SYSTEM 2. Removing Electrical Component Box and Duct Outdoor Unit Repair Procedures (7) Remove the lower duct: (remove 2 screws, and a hook) Lower duct Fig. 6 (8) Remove the upper duct: (remove 3 screws) (Fig. 7) Upper duct Fig.
  • Page 43 W-2WAY ECO-i SYSTEM 3. Discharging Compressor Oil Outdoor Unit Repair Procedures Discharged oil can be used for checking the condition of the system. Based on the appearance and color of the discharged oil, a judgment can be made on whether the system is operating normally or not. 3-1.
  • Page 44 W-2WAY ECO-i SYSTEM 4. Backup Operation Outdoor Unit Repair Procedures This system includes an emergency automatic backup function that allows the A/C to operate during the period after trouble occurs until repairs are made. However, during repair and at other times, use manual backup opera- tion.
  • Page 45 W-2WAY ECO-i SYSTEM 4. Backup Operation Outdoor Unit Repair Procedures <If the failed unit is the No. 1 outdoor unit (main unit)> If the No. 1 unit (main unit) has failed, a different outdoor unit must be set as the No. 1 unit (main unit). •...
  • Page 46 W-2WAY ECO-i SYSTEM 4. Backup Operation Outdoor Unit Repair Procedures 4-2-2. Backup operation by setting the failed compressor not to operate Backup operation settings for each compressor INV compressor AC1 compressor AC2 compressor Setting for backup operation Failed DIP switch S010: Turn BACK UP and AC2 ON.
  • Page 47 W-2WAY ECO-i SYSTEM 5. Recovering Refrigerant Outdoor Unit Repair Procedures The following equipment and tools are required: Jumper wire with clips, adjustable wrench, set of manifold gauge valves specially designed for refrigerant R410A only, vacuum pump, refrigerant recovery unit, pre-purged refrigerant cylinder for recovery, flathead screwdriver, and outdoor unit maintenance remote controller.
  • Page 48 W-2WAY ECO-i SYSTEM 5. Recovering Refrigerant Outdoor Unit Repair Procedures 5-2. Refrigerant Recovery Procedures (Indoor Unit) The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the indoor unit due to trouble in the refrigerant circuit. START 5-2-1.
  • Page 49 W-2WAY ECO-i SYSTEM 5. Recovering Refrigerant Outdoor Unit Repair Procedures (2) If the remote controller (RCS-TM80BG) is not available for maintenance of the outdoor unit Determine the outdoor unit where the unit No. setting (S007) (3P DIP switch) (Blue) on the outdoor unit control PCB is set to No.
  • Page 50 W-2WAY ECO-i SYSTEM 5. Recovering Refrigerant Outdoor Unit Repair Procedures 5-2-3. Refrigerant recovery procedures (2): Indoor unit with no ball valve equipped Refrigerant in all indoor units and the refrigerant tubing circuit must be pumped into the outdoor unit. The maximum refrigerant storage capacity per a single outdoor unit is approx.
  • Page 51 W-2WAY ECO-i SYSTEM 5. Recovering Refrigerant Outdoor Unit Repair Procedures Manifold gauge Liquid tube service port (For 7.94mm-dia. connector) Refrigerant recover unit Refrigerant recovery cylinder Gas tube service port (For 7.94mm-dia. connector) Fig. 11 5-3. Recovery of Refrigerant from Entire System (1) Turn off power to the entire outdoor system.
  • Page 52 W-2WAY ECO-i SYSTEM 6. Checking for Leakage After Repair Outdoor Unit Repair Procedures 6-1. Pressure Check for Leakage of Outdoor Unit After completing repair of the outdoor unit, carry out the following leakage check. (1) Check that all service valves for gas tubes, liquid tube, and balance tube in the repaired outdoor unit (units necessary to carry out the pressurized leak check) are fully closed.
  • Page 53 W-2WAY ECO-i SYSTEM 7. Evacuating System Outdoor Unit Repair Procedures This procedure is carried out to ensure there is no remaining refrigerant or other gases (nitrogen, etc.) in the repaired outdoor unit and tubing. 7-1. Evacuating Repaired Outdoor Unit (1) Check that each service valve of the gas tubes, liquid tube, and balance tube in the outdoor unit are fully closed. (2) Connect the manifold gauge valves to the high-pressure and low-pressure sensor outlets of the outdoor unit.
  • Page 54 W-2WAY ECO-i SYSTEM 8. Charging Compressor Oil Outdoor Unit Repair Procedures 8-1. If Refrigerant Has Already Been Charged to Outdoor Unit Be sure to use an exclusive oil-charging tank for charging compressor oil. Prior to charging, carry out vacuum dry- ing inside the tank and take care that no air (in the form of bubbles) is permitted to enter the tank.
  • Page 55 W-2WAY ECO-i SYSTEM 8. Charging Compressor Oil Outdoor Unit Repair Procedures (2) Charging compressor oil into oil-charging tank Connect a piece of pipe to the lower valve and then insert the other end deeply into the bottom of the oil con- tainer.
  • Page 56 W-2WAY ECO-i SYSTEM 8. Charging Compressor Oil Outdoor Unit Repair Procedures Next follow the instructions in “5-2-1. Cooling operation (for all units)” at the outdoor unit where oil will be charged, and start cooling operation at all units. When the operating conditions have stabilized, perform steps 1, 2, and 3 in sequence and open the valves.
  • Page 57 W-2WAY ECO-i SYSTEM 8. Charging Compressor Oil Outdoor Unit Repair Procedures Oil tube outlet port (For 6.35mm-dia. connector) High-pressure outlet port (For 7.94mm-dia. connector) Manifold gauge Vacuum pump Low-pressure outlet port (For 7.94mm-dia. connector) Fig. 19 8-3. Charging Additional Compressor Oil (after replacing compressor) The rated amount of oil is pre-charged in the compressors as given below: Model name Compressor model...
  • Page 58 W-2WAY ECO-i SYSTEM 9. Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures Required equipment and tools: Jumper wire with clips, adjustable wrench, set of manifold gauge valves for the refrigerant R410A, refrigerant recovery unit, pre-purged refrigerant cylinder for recovery, flat-head screwdriver, and outdoor unit maintenance remote controller.
  • Page 59 W-2WAY ECO-i SYSTEM 9. Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures (8) Short-circuit the vacuum application pin on the outdoor unit control PCB of the unit to be repaired. Then turn ON the outdoor unit power. When the vacuum application pin is short-circuited and the power is turned ON, all CAUTION solenoid valves in the outdoor unit are forced open, allowing the refrigerant to be recovered from all tubes which are separated by solenoid valves.
  • Page 60 W-2WAY ECO-i SYSTEM 9. Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures (9) Close the gas tube and balance tube on the outdoor unit to be repaired. Then slowly close the liquid tube ser- vice valve. * When the low pressure at the outdoor unit to be repaired reaches 0.5 MPa or below, pull out the SCT connec- tor (2P) (YEL) (CN231) from the outdoor unit control PCB of that outdoor unit.
  • Page 61 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-1. Compressor Trouble Diagnosis and Check Methods Generally, compressor failures can be classified into the following categories. → (1) Mechanical trouble (A) Locking (intrusion of foreign objects, galling, etc.) (B) Pressure rise failure (damaged valve, seal, bearing, or other component) (C) Noise (damaged stator rotor, valve, or other component) →...
  • Page 62 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-2. Replacing the Compressor(s) 10-2-1. Replacing only the failed compressor If backup operation is required, follow the instructions in “4. Backup Operation” and engage backup opera- tion. Follow the instructions in “10-3. Removing and Installing Compressor” and replace the failed compressor. Fully close the high- and low-pressure gauge valves on the manifold gauge, then stop the vacuum pump.
  • Page 63 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-2-2. Replacing all compressors in a failed unit Follow the instructions in “3. Discharging Compressor Oil” and drain the oil from the oil separator in the failed unit. Measure the amount of drained oil. If backup operation is required, follow the instructions in “4.
  • Page 64 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-2-3. Replacing all compressors in a system Follow the instructions in “3. Discharging Compressor Oil” and drain the oil from the oil separators in all out- door units. Measure the amount of drained oil. Follow the instructions in “10-3.
  • Page 65 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-2-4. Dry core cleaning If burning or other failures occur repeatedly at compressors within the same system, in many cases the cause is acid, sludge, carbon, or other substances that remain in the refrigeration cycle as the result of insufficient cleaning. If, when the oil is inspected, there is an outdoor unit where the oil color phase is 4.0 or higher, or where a sharp odor is present, carry out all steps below to perform dry core cleaning.
  • Page 66 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures (16) After evacuating all nitrogen gas from the tubing, apply vacuum to all outdoor units where dry cores were removed until the pressure is –101kPa (–755 mm Hg, 5 Torr) or less. (17) INSTALLATION: Refer to the “Information for the Person in Charge of Installation”...
  • Page 67 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures 10-3. Removing and Installing Compressors When removing and installing compressors, use sufficient caution to ensure that moisture or other substances do not enter the refrigerant tubing system. 10-3-1. Replacing compressors * For all models 705 – 1405, follow the replacement procedure below. (A) Replacing the inverter compressor (Compressor 1 on remote controller alarm display) I Removal Connect a manifold gauge to the high- and low-pressure outlet ports at the outdoor unit where the compressor...
  • Page 68 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures I Installation Remove the rubber stopper and tube cap (brazed) from the new compressor. Install the crankcase heater onto the new compressor. Place the 2 pieces of cushioning rubber in the designated positions on the compressor. Place the 2 pieces of cushioning rubber onto the legs of the new compressor.
  • Page 69 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures (B) Replacing the constant-speed compressor 1 (Compressor 2 on remote controller alarm display) I Removal Connect the manifold gauge to the high- and low-pressure outlet ports at the outdoor unit where the compres- sor will be replaced.
  • Page 70 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures I Installation Remove the 2 brazed tube caps (2 pieces) from the compressor. Remove hexagonal caps from the compressor. * When removing the hexagonal caps, hold the fixing nut at the main unit side so as not to loose it with a wrench or spanner.
  • Page 71 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures Brazing locations (3) Bolt Washer: 1 Rubber washer: 1 (1 each at the 3 locations) Protect the oil equalizer tube connectors Cushioning rubber guide Front view Fig. 28 Set the remaining cushioning rubber beneath the new compressor leg at the locations shown in the figure 28. Remove the bolts which are temporarily fastening the 2 pieces of cushioning rubber, and anchor the 3 com- pressor legs using the bolts, washers, and rubber washers.
  • Page 72 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures (C) Replacing constant-speed compressor 2 (Compressor 3 on the remote controller alarm display) I Removal Connect the manifold gauge to the high- and low-pressure outlet ports at the outdoor unit where the compressor will be replaced.
  • Page 73 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures I Installation Remove the capillary tube assembly from the removed compressor at the brazed location shown in the figure 30. At this time, remove the thermal insulation and sensor before disconnecting the tube. CAUTION Protect the oil equalizer tubing, rubber, clamps, and other items.
  • Page 74 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures Cushioning rubber Bolt(Temporary mounting, back side 2 locations, 1 piece each) Front view Crankcase heater Fig. 32 Place the remaining cushioning rubber onto the new compressor at the location shown in the figure 33. Remove the bolts which are temporarily fas- tening the 2 pieces of cushioning rubber, and anchor the 3 compressor legs using the...
  • Page 75 W-2WAY ECO-i SYSTEM 10. Compressor Outdoor Unit Repair Procedures (14) Re-install all components that were removed. Re-install the electrical component box in the same position as it was before. • Be sure to securely re-install the thermal insulation and clamps for the capillary CAUTION tube assembly in their original conditions, as shown in Fig 30.
  • Page 76 W-2WAY ECO-i SYSTEM 11. High and Low Pressure Sensors Outdoor Unit Repair Procedures The outdoor unit connection ports for the high and low pressure sensors employ Schrader-type push-to-release valves. Therefore it is not necessary to recover refrigerant when removing and installing them. 11-1.
  • Page 77 W-2WAY ECO-i SYSTEM 12. Replacing 4-way Valve Outdoor Unit Repair Procedures When replacing 4-way valve of models 1305 & 1405 (for models with 3 compressors), be sure to protect check valves, which are located adjacent to the 4-way valve, while performing replacement work. Models 705 – 1155 (for models with1 or 2 compressor) is not located near to the check valves, therefore no protection is necessary.
  • Page 78 W-2WAY ECO-i SYSTEM 12. Replacing 4-way Valve Outdoor Unit Repair Procedures 12-2. When the replacement is not available from the right side of the unit Follow the instructions of “10. Compressor” and remove the constant-speed compressor 2. Connect the manifold gauge to the high and low-pressure outlet ports at the outdoor unit where the 4-way valve will be replaced.
  • Page 79 W-2WAY ECO-i SYSTEM Outdoor Unit Maintenance Remote Controller 3. OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 1. Overview ............. . 3-2 2.
  • Page 80 W-2WAY ECO-i SYSTEM 1. Overview Outdoor Unit Maintenance Remote Controller OUTDOOR UNIT MAINTENANCE REMOTE [Service Checker Section] CONTROLLER (RCS-TM80BG) for W-2WAY ECO-i ■ About the outdoor unit maintenance remote controller The outdoor unit utilizes nonvolatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs.
  • Page 81 W-2WAY ECO-i SYSTEM 2. Functions Outdoor Unit Maintenance Remote Controller ■ Functions on the ordinary display (1) Functions: Button operations can be used to perform the following functions. • Start/stop of all indoor units • Switching between cooling and heating •...
  • Page 82 W-2WAY ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Functions on the ordinary display • Connect the special service checker wiring to the outdoor unit PCB. The connection is shown in the figure below. Outdoor unit PCB RC (3P, BLU) PCB connector (3P, BLU)
  • Page 83 W-2WAY ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ● All units start/stop (Fig. 1) <Operation> (ON/OFF operation) button can be used to start and stop all the indoor units. • The LED illuminates if any indoor units is operating. •...
  • Page 84 W-2WAY ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Display (functions) • Use the temperature setting buttons to change the item code. Item code Item Remarks ➀ Outdoor unit alarm ➁ Alarm code display No.
  • Page 85 W-2WAY ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller (3) XX-YY R.C. ➀ ➁ ➂ Locations where , and are displayed Displays the outdoor unit sub-bus address which is as shown in Fig. 3. currently selected. XX = Outdoor system address on main bus line (1 –...
  • Page 86 W-2WAY ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Concerning the 7-segment, 4-digit display remote controller timer display The unit Nos. of connected units are indicated by four 7-segment digits ( ) and a colon. ●...
  • Page 87 W-2WAY ECO-i SYSTEM 4. Monitoring Operations Outdoor Unit Maintenance Remote Controller Display the indoor unit and outdoor unit sensor temperatures. <Operating procedure> ➀ Press and hold the (CHECK) button and buttons simultaneously for 4 seconds or longer to engage temperature monitor mode. During temperature monitoring, is illuminates.
  • Page 88 W-2WAY ECO-i SYSTEM 4. Monitoring Operations Outdoor Unit Maintenance Remote Controller ■ Display of unit No. 1 (main unit) Description Remarks Intake temp. °C °C °C °C Indoor unit Discharge temp. °C Discharge temp. setting °C Indoor unit electronic control valve position STEP Discharge temp.
  • Page 89 W-2WAY ECO-i SYSTEM 5. Outdoor Unit Alarm History Monitor Outdoor Unit Maintenance Remote Controller • Displays outdoor unit alarms only. • Check the indoor unit alarm histories separately using the indoor unit remote controllers or other control device. <Operating procedure> ➀...
  • Page 90 W-2WAY ECO-i SYSTEM 6. Mode Settings Outdoor Unit Maintenance Remote Controller ■ Setting mode 1 Display of fi rst 4 digits <Operating procedure> ➀ Press and hold the (CHECK) button and (VENTILATION) button simultaneously for 4 seconds or longer. ➁ Press the temperature setting buttons to change the item code.
  • Page 91 W-2WAY ECO-i SYSTEM 6. Mode Settings Outdoor Unit Maintenance Remote Controller ■ Setting mode 2 <Operating procedure> ➀ Press and hold the (CHECK) button, button, and button simultaneously for 4 seconds or longer. ➁ Press the temperature setting buttons to change the item code.
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  • Page 93 W-2WAY ECO-i SYSTEM Remote Controller Functions 4. REMOTE CONTROLLER FUNCTIONS 1. Simple Settings Function ..........4-2 2.
  • Page 94 W-2WAY ECO-i SYSTEM 1. Simple Settings Function Remote Controller Functions • This allows the filter lifetime, operating mode [Remote Controller Functions Section] priority change, central control address, and other settings to be made for an individual or group- control indoor unit to which the remote controller used for simple settings is connected.
  • Page 95 W-2WAY ECO-i SYSTEM 1. Simple Settings Function Remote Controller Functions List of Simple Setting Items Setting data Item code Item Description 0000 Not displayed 0001 150 hours 0002 2,500 hours Filter sign ON time (fi tlter life time) 0003 5,000 hours 0004 10,000 hours 0005...
  • Page 96 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions • This allows the system address, indoor unit address, and other settings to be made for the individual or group-control indoor unit to which the remote controller used for detailed settings is connected.
  • Page 97 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions List of Detailed Setting Items Setting data Item code Item Description Description Description 1-Way Air Discharge 4-Way Air Discharge 2-Way Air Discharge 0000 0001 0002 Semi-Concealed (A) Semi-Concealed (X, XM) Semi-Concealed (S) 1-Way Air Discharge Concealed-Duct High...
  • Page 98 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description 0000 5 minutes (1B) Forced thermostat ON time 0001 4 minutes –010 –10°C –009 –9°C Cooling discharge –008 –8°C temperature shift 0010 10°C –010 –10°C –009 –9°C...
  • Page 99 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description 0000 No forced operation 0001 Forced operation for 1 minute Automatic drain pump operation 0060 Continuous operation 0000 None Ventilation fan operation 0001 Ventilation fan operated by remote controller. 0000 Not used.
  • Page 100 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description DC fan tap operating Purpose mode 0000 Standard Standard (setting at shipment) High ceiling use High ceiling setting 1 (with standard panel) 0001 For low Ultra long-life fi...
  • Page 101 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Simple setting items Item code Item Description Filter sign ON time setting Changes the indoor unit fi lter lifetime when a high-performance fi lter or other (fi lter lifetime) optional product is installed. Reduces the fi...
  • Page 102 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description Set when using a central control device. Central control address Used when setting the central control address manually from the remote controller. Operating mode priority change Note (1) NOTE (1) Explanation of operation mode priority change...
  • Page 103 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions When the operating mode at the priority remote controller is changed, the operating modes of other remote controllers change as shown below. Mode change at priority remote controller Operating modes at other remote controllers Current mode New mode Current mode...
  • Page 104 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description Unit type Set when the indoor unit EEPROM memory is replaced during servicing. Indoor unit capacity System (outdoor unit) address These are not set at the time of shipping from the factory. These must be set after installation if automatic address setting is not Indoor unit address performed.
  • Page 105 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description 1F (Upper limit) Cooling 20 (Lower limit) 21 (Upper limit) This setting changes the temperature range (upper limit and lower limit) Heating 22 (Lower limit) Change to the remote which is set from the remote controller or central control device.
  • Page 106 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions (Continued from previous page) Item code Item Description Heat exchanger temperature for The heat exchanger temperature control point for prevention of cold air cold air discharge discharge during heating operation can be changed. The indoor unit PCB optional output for the fan can be switched Fan output switching according to the purpose of use.
  • Page 107 W-2WAY ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions ■ DC Fan Tap Change Procedure <Procedure> Be sure to turn the main power OFF before performing the steps below. (1) Check the optional product that will be used from the table below. Setting No.
  • Page 108 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions • The remote controller includes a number of servicing functions. Use these as needed for test runs and inspections. List of Servicing Functions Functions Description Button operation Reset operation Unit status Operation with Press and hold the...
  • Page 109 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions Test Run Function Operates the unit with the thermostat forced ON. <Procedure> ➀ Press and hold the button for 4 seconds or longer. ➁ “Test” appears on the remote controller LCD display (Fig.
  • Page 110 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions ■ Sensor Temperature Display Function (displayed regardless of whether unit is operating or stopped) The procedure below displays the sensor temperatures from the remote controller, indoor unit, and outdoor unit on the remote controller. <Procedure>...
  • Page 111 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions Outdoor unit sensors Indoor unit sensors Unit No.1 Unit No.2 Unit No.3 Intake temp. Discharge temp. 1 Discharge temp. 2 High-pressure sensor temp. Heat exchanger gas 1 Heat exchanger liquid 1 Heat exchanger gas 2 Discharge temp.
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  • Page 113 W-2WAY ECO-i SYSTEM Trouble Diagnosis 5. TROUBLE DIAGNOSIS 1. Contents of Remote Controller Switch Alarm Display ......5-2 2.
  • Page 114 W-2WAY ECO-i SYSTEM 1. Contents of Remote Controller Trouble Diagnosis Switch Alarm Display Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Serial Remote controller is detecting Error in receiving serial communication signal. (Signal from communication error signal from indoor unit.
  • Page 115 W-2WAY ECO-i SYSTEM 1. Contents of Remote Controller Trouble Diagnosis Switch Alarm Display Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Thermistor fault Outdoor unit Compressor 1 (INV) discharge temp. sensor Compressor 2 (constant speed) discharge temp. sensor Compressor 3 (constant speed) discharge temp.
  • Page 116 W-2WAY ECO-i SYSTEM 2. Outdoor Unit Control Panel LED Display Trouble Diagnosis : ON : Blinking : OFF) LED (RED) Display meaning After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor units in that system is possible. (Both ON) After power is turned ON (and automatic address setting is not in progress), one or more indoor units are confi...
  • Page 117 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Trouble Diagnosis Sensor temperature display function (displayed both when unit is running and stopped) • Use the following check procedure to display the sensor temperatures from the remote controller, indoor unit, and outdoor unit sensors on the remote controller display.
  • Page 118 W-2WAY ECO-i SYSTEM 3. Remote Controller Servicing Functions Trouble Diagnosis Sensor Temperature Relationship Table Location where sensor Sensor address Sensor type Sensor address Sensor type is installed Remote controller temperature Discharge temperature sensor Indoor unit intake temperature Indoor unit heat exchanger Indoor unit electronic expansion Indoor unit temperature (E1)
  • Page 119 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis With types 705, 905 and 1155, the INV compressor is compressor 1, and the constant-speed compressor is compressor 2. With types 1305 and 1405, the INV compressor is compressor 1, and the constant-speed compressors (AC1, AC2) are compressors 2 and 3.
  • Page 120 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis Compressor 1 discharge temperature trouble 5-23 High-pressure switch activated 5-24 Reverse phase (or missing phase) detected 5-24 Compressor 1 (INV) overcurrent alarm 5-24 Compressor 2 discharge temperature trouble 5-23 Compressor 3 discharge temperature trouble 5-23 Fan motor trouble 5-25...
  • Page 121 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis E06 Alarm Alarm code Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions Outdoor unit failed to receive serial communication signals from indoor unit. Probable cause (1) The indoor unit power was cut OFF after initial communications were completed.
  • Page 122 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis E16 Alarm Alarm code Alarm meaning Automatic address setting alarm (too many units) Alarm conditions • The number of indoor units was too many when automatic address setting was performed. •...
  • Page 123 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis E25 Alarm Alarm code Alarm meaning Outdoor unit address setting failure (duplication) Alarm conditions Communication by outdoor unit main-sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes. Probable cause The unit number is set incorrectly.
  • Page 124 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis F04, F05, F22 Alarm Alarm code F04, F05, F22 Alarm meaning Compressor 1 discharge temperature sensor trouble, compressor 2 discharge temperature sensor trouble, Compressor 3 discharge temperature sensor trouble. Alarm conditions (1) Discharge temp.
  • Page 125 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis Check (3) Leakage from the discharge tube check valve Trouble: Although the other compressor is operating and this compressor is stopped, the discharge temperature of this compressor rises together with the temperature of the other compressor.
  • Page 126 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis F08 Alarm Alarm code Alarm meaning Outdoor air temperature sensor trouble Alarm conditions (1) A/D step is 10 steps or less (short circuit). (2) A/D step is 1014 steps or more (open circuit) Probable cause (1) Sensor malfunction (including connector) (2) PCB malfunction...
  • Page 127 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis F16 Alarm Alarm code Alarm meaning High-pressure sensor trouble (abnormal rise in high pressure) (In some cases this may not be the result of a high-pressure sensor malfunction.) Alarm conditions •...
  • Page 128 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis Correction (1) Replace the high-pressure sensor. Caution: Because the high-pressure sensor connection employs a Schrader-type valve, it can be removed and replaced. However, the high-pressure sensor can be easily damaged by high voltage; therefore use suffi cient caution with regard to static electricity.
  • Page 129 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis H11, H12, H21, H22 Alarm Alarm code H11, H12, H21, H22 Alarm meaning H11: Constant speed compressor 2 overcurrent alarm H12: Constant speed compressor 2 lock current alarm H21: Constant speed compressor 3 overcurrent alarm H22: Constant speed compressor 3 lock current alarm Alarm conditions Hx1: During operation, the compressor current value exceeded 12 A for 30 seconds or longer.
  • Page 130 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis H03, H13, H23 Alarm Alarm code H03, H13, H23 Alarm meaning Compressor 1 CT sensor disconnected or short-circuit; Compressor 2 CT sensor disconnected or short-circuit; Compressor 3 CT sensor disconnected or short-circuit Alarm conditions Current value at compressor 1 was 18 A or less, and at compressors 2 and 3 was 2 A or less when 2 seconds or more had passed after the compressor began operation and output.
  • Page 131 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis H06 Alarm Alarm code Alarm meaning Low-pressure switch activated Alarm conditions A report occurs during A/C operation when the low-pressure sensor installed at constant low-pressure parts detects a pressure of 0.05 MPa or less continuously for 2 minutes, or an instantaneous pressure of 0.02 MPa or less.
  • Page 132 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis H07 Alarm Alarm code Alarm meaning No-oil alarm Alarm conditions This alarm occurs when oil does not fl ow for a specifi ed amount of time in tubing where oil fl...
  • Page 133 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis H31 Alarm Alarm code Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifi es a trouble signal (indicating abnormal HIC temperature or other trouble) from the HIC. The HIC judges the current and temperature, and outputs the trouble signal.
  • Page 134 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis L10 Alarm Alarm code Alarm meaning Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set, or the setting is not allowed by the system. Probable cause This alarm occurs because the capacity has not been set.
  • Page 135 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis P03, P17, P18 Alarm Alarm code P03, P17, P18 Alarm meaning Compressor 1 discharge temperature trouble; Compressor 2 discharge temperature trouble; Compressor 3 discharge temperature trouble Alarm conditions Temperature is 106°C or higher and pre-trip stop has occurred. The alarm occurs when pre-trip stop occurs more than once.
  • Page 136 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis P04 Alarm Alarm code Alarm meaning High-pressure switch activated. Alarm conditions The operation of the electronic circuit in the high-pressure switch may short-circuit the terminal depending on the pressure. A pressure of 3.3 MPa or above will short-circuit the terminal. Once the terminal is short-circuited, it will remain in that state until the pressure goes below 2.6 MPa.
  • Page 137 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis P22 Alarm Alarm code Alarm meaning Fan motor trouble Alarm conditions Fan motor start failure, fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure. Check Check the fan motor wiring, the Hall IC wiring, and the connector connections.
  • Page 138 W-2WAY ECO-i SYSTEM 4. W-2WAY ECO-i Alarm Codes Trouble Diagnosis P29 Alarm Alarm code Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start, and occurs when missing phase or lock is detected, and when a DCCT failure occurs.
  • Page 139 W-2WAY ECO-i SYSTEM 5. Blinking Inspection Display Trouble Diagnosis on the Remote Controller Blinking inspection display (2) (compressor magnet SW seizing detection) Alarm code (Blinking inspection display) Alarm meaning Compressor magnet SW seizing detected Status: Although an outdoor unit exists where the outdoor unit fan is running, no compressors in the system are operating.
  • Page 140 W-2WAY ECO-i SYSTEM 6. Inspection of Parts Trouble Diagnosis (1) High-pressure switch (63PH1, 63PH2, 63PH3) • 63PH1: Disconnect the CN042 connector (3P, white) from the outdoor unit control panel. Measure the resis- tance between socket pins 1 and 3. The resistance is OK if the result is 0 Ω. •...
  • Page 141 W-2WAY ECO-i SYSTEM 7. Test Pin Trouble Diagnosis When the test pin on the outdoor unit control PCB is short-circuited, each part can be operated individually. • After turning OFF the main unit power, short circuit the test pin (CN022, white), then turn the power back ON. Output is performed in the sequence shown in the table below, for 0.5 seconds each.
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  • Page 143 SANYO Electric Co., Ltd. 200809B B + DC Printed in Japan...

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