Page 2 - REFERENCE MANUAL; INDOOR UNIT SERVICE MANUAL; Model name
2 1 REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Model name Service ref. Service manual No. EHST20C-VM6HBEHST20C-YM9HBEHST20C-VM6BEHST20C-YM9BEHST20C-VM6EBEHST20C-YM9EBEHST20C-VM6SBEHPT20X-VM2HBEHPT20X-VM6HBEHPT20X-YM9HBEHPT20X-VM6BEHPT20X-YM9B EHST20C-VM6HB.UKEHST20C-YM9HB.UKEHST20C-VM6B.UKEHST20C-Y...
Page 3 - SAFETY PRECAUTION; Cautions for units utilizing refrigerant R410A
3 2 SAFETY PRECAUTION Cautions for units utilizing refrigerant R410A 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Use new refrigerant pipes. Make sure that the inside and outside of refrige-rant piping is clean and it has no contaminationsuch as sulfur hazardous for use, oxides, dirt, shaving particles,...
Page 4 - When charging directly from cylinder
4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Tool name Specifications 1 Gauge manifold ·Only for R410A ·Use the existing fitting specifications. (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose ·Only for R410...
Page 5 - -3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES; Flowchart; collecting in the base of the outdoor unit could cause rust.
5 2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES Flowchart Perform the airtight test, vacuum air purging, additional refrigerant charging (if necessary), and gas leak check. • Refer to the fl owchart below to determine if the existing pipes can be used and if it is necessary to use a f...
Page 6 - Cautions for refrigerant piping work; Thickness of pipes
6 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A ...
Page 7 - FEATURES
7 3 FEATURES PUHZ-SW75VHA.UKPUHZ-SW75VHA-BS.UK CHARGELESS SYSTEMPRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.(Max. 10m (PUHZ-SW75-120)) The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless of the length...
Page 8 - SPECIFICATIONS
8 4 SPECIFICATIONS <Reference data> Plate heat exchanger (ACH70-40 plates) Nominal water fl ow L/min 22.9 Heating(A7/W35) Capacity kW 8.00 COP 4.40 Power input kW 1.82 Heating(A7/W45) Capacity kW 8.00 COP 3.40 Power input kW 2.35 Heating(A2/W35) Capacity kW 7.50 COP 3.40 Power input kW 2.20 He...
Page 11 - DATA; Initial; Compressor model
11 5 DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A : kg) 5-2. COMPRESSOR TECHNICAL DATA Service Ref. Piping length (one way) Initial charged 10m 20m 30m 40m 50m 60m 75m PUHZ-SW75VHA.UKPUHZ-SW75VHA-BS.UK 3.2 3.6 4.0 4.6 — — — 3.2 PUHZ-SW100VHA.UKPUHZ-SW100VHA-BS.UKPUHZ-SW100YHA.UKPUHZ-SW100YHA-BS.UK ...
Page 13 - OUTLINES AND DIMENSIONS; Rear Air; Piping Knockout Hole Details; PIPING-WIRING DIRECTIONS
13 6 OUTLINES AND DIMENSIONS Unit : mm Air Intake Rear Air Intake Handle for moving Handle for moving 322 950 473 943 23 *1 447 *1 431 673 2 1 Handle for moving Handle for moving Service panel Earth terminal Left···Power supply wiring Right···Indoor/Outdoor wiring Terminal Connections Rear piping co...
Page 14 - Example of Notes; VHA
14 Handle for moving Side Air Intake Front piping cover Rear piping cover Air intake Rear Air Intake Handle for moving Handle for moving Terminal connection Left···Power supply wiring Right···Indoor/Outdoor wiring Earth terminal Service panel Handle for moving 1 2 Air Discharge Rear Air Intake Side ...
Page 15 - WIRING DIAGRAM
15 7 WIRING DIAGRAM 1 2 3 4 5 6 7 8 OFF ON 75V MODEL SW6 * 1 MODEL SELECT The black square ( ) indicates a switch position. SW5-6 * 2 OFF ON 1 2 3 4 5 6 * 2 SW5 -1 to 5 : Function Switch SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1MCMF121S463H63HSTH3TH4TH6TH7TH8TH34LEV-A, LEV-BACLCY1, CY2 Terminal Block ...
Page 18 - WIRING SPECIFICATIONS; FIELD ELECTRICAL WIRING (power wiring specifications)
18 8 WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model SW75V SW100V SW120V SW100, 120Y Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit input capacity ...
Page 19 - REFRIGERANT SYSTEM DIAGRAM
19 9 REFRIGERANT SYSTEM DIAGRAM unit : mm(inch) Distributor Thermistor TH7 (Ambient) Heat exchanger Refrigerant LIQUID pipe connection : 9.52(3/8) Stop valve (with service port) Strainer #100 Power receiver Linear expansion valve B Linear expansion valve A Strainer #100 Thermistor TH6 (2-phase pipe)...
Page 20 - Stop
20 9-2. Unit replacement operation When reusing the existing pipes that carried R22 refrigerant for the SW75/100/120 models, replacement operation must be performed before performing a test run. 1 If new pipes are used, these procedures are not necessary. 2 If existing pipes that carried R22 refrige...
Page 21 - TROUBLESHOOTING
21 10 TROUBLESHOOTING 10-1. TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trou...
Page 22 - ; Note: Refer to indoor unit section for code P and code E.; Error Code
22 10-3. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> Note: Refer to indoor unit section for code P and code E. Error Code Abnormal point and detection method Case Judgment and action None — 1 No voltage is supplied to terminal block (TB1) of outdoor unit. a...
Page 24 -
24 Error Code Abnormal point and detection method Judgment and action U1 High pressure (High-pressure switch 63H operated) Abnormal if high-pressure switch 63H operated ( ) during compressor operation. 4.15 MPa 63H: High-pressure switch 1 Short cycle of indoor unit 2 Clogged filter of indoor unit 3 ...
Page 34 - Symptoms: Nothing is displayed on the remote controller
34 AC 198V to AC 264V? AC 198V to AC 264V? AC 198V to AC 264V? DC 12V to DC 16V? DC 12V to DC 16V? NO YES NO YES NO YES YES NO YES NO Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit. Check the voltage am...
Page 35 - Check the status
35 AC 198V to AC 264V? Are there looseness or disconnection of the indoor/ outdoor connecting wire? Is anything displayed? DC 17V to DC 28V? Is “E8” displayed? Can all the indoor unit be operated? Check the voltage between S2 and S3 on the terminal block of the outdoor unit. NO YES Not lighting. Bli...
Page 41 - PRESSURE; SENSOR
41 Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) Self checkSymptom : The outdoor ...
Page 43 -
43 <Output pulse signal and the valve operation> (2) Linear expansion valve operation Open Extra tightning (about 32 pulse) Pulse number 500 pulse Opening a valve all the way Close V alve position (capacity) Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8 Closing a valve : 1 → 2 → 3 → 4 → ...
Page 44 - (3) How to attach and detach the coil of linear expansion valve
44 Main body Lead wire Stopper Coil Be sure to attach the stopper. A (3) How to attach and detach the coil of linear expansion valve <Composition>Linear expansion valve is separable into the main body and the coil as shown in the diagram below. <How to detach the coil> Hold the lower par...
Page 45 - CNDM
45 10-7. TEST POINT DIAGRAMOutdoor controller circuit boardPUHZ-SW75VHA(-BS).UKPUHZ-SW100VHA(-BS).UK PUHZ-SW100YHA(-BS).UK PUHZ-SW120VHA(-BS).UKPUHZ-SW120YHA(-BS).UK – + } <CAUTION> TEST POINT 1 is high voltage. SW4 Test operation SW6 Model select SW5 Function switch,Model select SW1 Forced de...
Page 47 - CNDC; Connect to the earth
47 Outdoor noise filter circuit boardPUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UKPUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK LI1, LI2, LI3, NIPOWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC400V inputLI1-NI/LI2-NI/LI3-NI : AC230V input(Connect to the terminal block (TB1)) GD1 Connect to the earth CNAC2AC230V (Connect to t...
Page 50 - Connect to the CK capacitor; Diode module
50 Outdoor power circuit boardPUHZ-SW100YHA.UKPUHZ-SW100YHA-BS.UKPUHZ-SW120YHA.UKPUHZ-SW120YHA-BS.UK Brief Check of POWER MODULE* Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, ...
Page 52 - Model select
52 10-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches w 1 Forced defrost should be done as follows. 1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON. 2 Forced defrost will start by the above operation 1 if all these conditions written below are satisfied...
Page 53 - Special function; How to wire
53 Special function (a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial time...
Page 56 - SW2 setting; Display detail; Operation indicator SW2 : Indicator change of self diagnosis; Display during error postponement
56 <Outdoor unit operation monitor function>[When optional part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-...
Page 59 - Capacity; Single phase / 3 phase
59 SW2 setting 1 ON 2 3 4 5 6 Display detail Explanation for display Unit Capacity setting display Displayed as an outdoor capacity code. Code display 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Outdoor unit setting information Indoor pipe temperature / Liquid (TH2(1))Indoor 1-39 – 88 Code display : -39 – 88(When...
Page 62 - Pulse
62 SW2 setting Display detail Explanation for display Unit 1 ON 2 3 4 5 6 Pulse LEV-A opening pulse on error occurring0 – 480 0 – 480(When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.)(Example) When 130 pulse; 0.5 secs. 0.5secs. 2 secs. : Indoor room tem...
Page 63 - When there is no indoor unit, “00” is displayed.
63 SW2 setting Display detail Explanation for display Unit : 0 – 255(When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)(Example) When 150°C; 0.5 secs. 0.5secs. 2 secs. Sub cool on error occurring SC0 – 130 Cooling = T 63HS - TH3 Heating = T 63HS...
Page 64 - Code
64 SW2 setting Display detail Explanation for display Unit 1 ON 2 3 4 5 6 Comp. surface temperature (TH34)3 – 217 3 – 217 (When the comp.shell thermistor detects 100°C ormore, hundreds digit, tens digit and ones digit aredisplayed by turns.)(Example) When 105°C; 0.5 secs. 0.5secs. 2 secs. 05 1 : 1 O...
Page 65 - Removing the service panel and top panel; Photo 1; Removing the electrical parts box; DISASSEMBLY PROCEDURE
OPERATING PROCEDURE PHOTOS & ILLUSTRATION 65 PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 × 12) o...
Page 66 - Photo 4; Clamp; Photo 5; Sensor holder
OPERATING PROCEDURE PHOTOS 66 Thermistor <2-phase pipe> (TH6) Photo 4 4. Removing the thermistor <2-phase pipe> (TH6) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (red) on the controller circuit board in the electr...
Page 67 - board in the electrical parts box.; of the unit and then remove the right side panel.; ing the right side panel.; Photo 7; LEV; LEV
OPERATING PROCEDURE PHOTOS 67 7. Removing the 4-way valve coil (21S4), LEV coil (LEV-A, LEV-B) (1) Remove the service panel. (See Photo 1)(2) Remove the top panel. (See Photo 1)(3) Remove the electrical parts box. (See Photo 3) [Removing the 4-way valve coil] (4) Remove 4-way valve coil fixing screw...
Page 68 - * The reactor is attached to the rear of the electrical parts box.; Note 1: Recover refrigerant without spreading it in the air.; Reactor fixing screws; Photo 9; Electrical parts box
OPERATING PROCEDURE PHOTOS 68 11. Removing the reactor (ACL) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 3) (4) Remove 4 reactor fixing screws (4 × 20) and remove the reactor. * The reactor is attached to the rea...
Page 69 - (9) Remove 4 welded pipes of power receiver inlet and outlet.; Note: Recover refrigerant without spreading it in the air.
OPERATING PROCEDURE PHOTOS 69 12. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel. (See Photo 2-1) (4) Remove 2 back cover panel fixing screws (5 × ...
Page 70 - OPERATING PROCEDURE; Photo 3; PHOTOS & ILLUSTRATION
70 OPERATING PROCEDURE PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UKPUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for re...
Page 71 - PHOTOS
71 OPERATING PROCEDURE Photo 4 4. Removing the thermistor <2-phase pipe> (TH6) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors, TH7/6 (red), on the controller circuit board in the electrical parts box. (4) Loosen the clamp for t...
Page 72 - Note 1: Recover refrigerant without spreading it in
72 OPERATING PROCEDURE 7. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A), LEV(B)) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) [Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M5 × 6). (4) Remove the 4-way valve coil by slid...
Page 73 - Valve bed; The reactor and capacitor is attached to the rear of the
73 12. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel. (See Photo 3.) (4) Remove 2 back cover panel fixing screws (5 × 12) and remove the back cove...
Page 74 - Continued to the next page.
74 OPERATING PROCEDURE PHOTOS & ILLUSTRATION Photo 3 3. Removing the electrical parts box (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the indoor/outdoor connecting wire from terminal block. (4) Disconnect the connector CNF1, CNF2, LEV-A and ...
Page 75 - Disassembling the electrical parts box
75 OPERATING PROCEDURE 4. Disassembling the electrical parts box (1) Disconnect all the connectors on the controller circuit board. (2) Remove the 3 screws, screw 1 , 2 and 3 , that fix the plate equipped with the outdoor controller circuit board, and the electrical parts box, screw 1 from the front...
Page 76 - Loosen the 2 wire clamps on top of the electrical parts box.; Photo 6
76 Photo 5 5. Removing the thermistor <2-phase pipe> (TH6) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (red), on the controller circuit board in the electrical parts box. (4) Loosen the 2 wire clamps on top of the elect...