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OC368B--1.qxp 07.6.20 1:01 PM Page 1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
June 2007
No. OC368
REVISED EDITION-B
SERVICE MANUAL
Revision:
Indoor unit • WIRING DIAGRAM has been
[Model names] [Service Ref.] changed in REVISED EDI-
TION-B.
• Some descriptions have been
PCA-A24GA
PCA-A24GA
modified.
PCA-A24GA1
• Please void OC368 REVISED
EDITION-A.
PCA-A30GA
PCA-A30GA
NOTE:
PCA-A30GA1
• This manual describes only
service data of the indoor
PCA-A36GA
units.
PCA-A36GA
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OC368B--1.qxp 07.6.20 1:01 PM Page 2 1 TECHNICAL CHANGES PCA-A24GA PCA-A24GA1 PCA-A30GA PCA-A30GA1 PCA-A36GA PCA-A36GA1 PCA-A42GA PCA-A42GA1 • Indoor controller board has been changed. REFERENCE MANUAL 2 2-1. OUTDOOR UNIT SERVICE MANUAL Service Manual No. Service Ref. PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS OC367 PUY-A12/18/24/30/36/42NHA(1) PUY-A12/18/24/30/36/42NHA(1)-BS 2-2. TECHNICAL DATA BOOK Manual No. Series (Outdoor unit) PUZ-A·NHA PUZ-A·NHA-BS OCS04 PUY-A·NHA PUY-A·
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OC368B--1.qxp 07.6.20 1:01 PM Page 3 3 SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminals, all supply circuits must be disconnected. 3-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. If other refrigerant (R22 etc.) is used, chlorine in refrige- rant can cause deterioration of refrigerant oil etc. Make sure that the inside and outside of refrige- rant pipi
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OC368B--1.qxp 07.6.20 1:01 PM Page 4 [2] Additional refrigerant charge When charging directly from cylinder · Check that cylinder for R410A on the market is syphon type. · Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.) Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Specifications 1 Gauge manifold ·Only for R410A ·Use the existing fitting specifications. (UNF1/2)
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OC368B--1.qxp 07.6.20 1:01 PM Page 5 4 PART NAMES AND FUNCTIONS l Indoor Unit Left/right guide vanes Change the direction of airflow from the horizontal blower. Air outlet Long-life filter Removes dust and foreign matter from air coming in through the grille (Recommended cleaning interval : Approx. every 2,500 operating hours) Air intake Up/down guide vanes Intake grille Change the direction of airflow from the vertical blower. l Wired remote controller Once the controllers are set, the same
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OC368B--1.qxp 07.6.20 1:01 PM Page 6 l Wired remote controller Display Section Day-of-Week “Sensor” indication For purposes of this explanation, Shows the current day of the week. Displayed when the remote controller all parts of the display are shown as lit. During actual operation, only sensor is used. the relevant items will be lit. Time/Timer Display Shows the current time, unless the simple or Auto Off “Locked” indicator timer is set. Indicates that remote controller but- If the simple or
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OC368B--1.qxp 07.6.20 1:01 PM Page 7 l Wireless remote controller display CHECK TEST RUN Indicate that the unit is being checked or test-run. display display MODEL SELECT Blinks when model is selected. Lights up while the signal is transmitted to the indoor unit when the button is pressed. Temperature setting display indicates the desired temperature setting which is set. OPERATION MODE display CLOCK display OPERATION MODE display Displays the current time. Indicates which operation
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OC368B--1.qxp 07.6.20 1:01 PM Page 8 5 SPECIFICATIONS PCA-A24GA, PCA-A24GA1 Service Ref. Power supply(phase, cycle, voltage) Single phase, 60Hz, 208/230V Max. Fuse Size A 15 Min.Circuit Ampacity A 1 External finish Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil Fan Fan(drive) o No. Sirocco fan (direct) o 3 Fan motor output 0.070 kW Fan motor 0.53 F.L.A Dry: 14-15-16-18(495-530-565-635) 3 m /min(CFM) Airflow(Low-Medium2-Medium1-High) Wet: 13-14-15-16(445-480-510-570)
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OC368B--1.qxp 07.6.20 1:01 PM Page 9 PCA-A42GA, PCA-A42GA1 Service Ref. Power supply(phase, cycle, voltage) Single phase, 60Hz, 208/230V A Max. Fuse Size 15 A Min.Circuit Ampacity 1 External finish Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil Fan Fan(drive) o No. Sirocco fan (direct) o 3 Fan motor output kW 0.090 Fan motor F.L.A 0.69 Dry: 20-21-23-25(705-740-810-885) K/min(CFM) Airflow(Low-Medium2-Medium1-High) Wet:18-19-21-22(635-670-730-790) External static pre
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OC368B--1.qxp 07.6.20 1:01 PM Page 10 7 OUTLINES AND DIMENSIONS Unit : inch(mm) PCA-A24GA PCA-A24GA1 PCA-A30GA PCA-A30GA1 6 NOTES: Use M10 or W3/8 screw for anchor bolt. MODEL 24/30 5 Liquid pipe 3/8F 5-1/2(140) 2-3/4(70) 4 Gas pipe 5/8F 48-13/16(1240) (Suspension bolt pitch) 3-7/16(87) 50-13/16(1290) 5/8(16) 7-3/16(182) liquid 47-13/16(1214) 7/15/16(201) gas 51-9/16(1310) 9-1/2(241) (Drainage) Air outlet Rear wall Allowing clearances Ceiling 6-3/8(161) 3-17/32(90) 9-13/16(250) Less than 48-3/
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OC368B--1.qxp 07.6.20 1:01 PM Page 11 Unit : inch(mm) PCA-A36GA PCA-A36GA1 PCA-A42GA PCA-A42GA1 6 NOTES: Use M10 or W3/8 screw for anchor bolt. 5-1/2(140) 2-3/4(70) MODEL 36/42 5 Liquid pipe 3/8F 4 Gas pipe 5/8F 48-13/16(1240) (Suspension bolt pitch) 3-7/16(87) 50-13/16(1290) 5/8(16) 7-3/16(182) liquid Air outlet 47-13/16(1214) 7-13/16(198) gas 51-9/16(1310) 9-5/8(245) (Drainage) Rear wall Allowing clearances Ceiling 6-3/8(160) 3-17/32(90) 9-13/16(250) 48-3/8(1228) 11-13/16 Less than 10-5/8(27
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OC368B--1.qxp 07.6.20 1:01 PM Page 12 WIRING DIAGRAM 8 PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA1 PCA-A30GA1 PCA-A36GA1 PCA-A42GA1 [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME P.B INDOOR POWER BOARD C CAPACITOR W.B WIRELESS REMOTE CONTROLLER BOARD(OPTION) I.B INDOOR CONTROLLER BOARD MF FAN MOTOR RU RECEIVING UNIT FUSE FUSE (6.3A/250V) MV BZ BUZZER VANE MOTOR ZNR VARISTOR TB4 TERMINAL BLOCK CONNECTING LINE> LED2 CN2L CONNECTOR
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OC368B--1.qxp 07.6.20 1:01 PM Page 13 REFRIGERANT SYSTEM DIAGRAM 9 PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA PCA-A24GA1 PCA-A30GA1 PCA-A36GA1 PCA-A42GA1 Strainer #50 Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer Distributor #50 with strainer #50 13
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OC368B--1.qxp 07.6.20 1:01 PM Page 14 10 TROUBLESHOOTING 10-1. TROUBLESHOOTING Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the inferior phenomenon reoccurrence at field are summarized in the table below. Check the contents below before investigating details. Unit conditions at service Error code A
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OC368B--1.qxp 07.6.20 1:01 PM Page 15 Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. 10-2. SELF-DIAGNOSIS ACTION TABLE Abnormal point and detection method Countermeasure Error Code Cause Room temperature thermistor (TH1) 1 Defective thermistor 1–3 Check resistance value of thermistor. • • • • • • • • • • • 1 The unit is in 3-minute resume preven- characteristics 0: (32˚F) 15.0k" tion mode if short/open of thermistor is • • • • • • • • • • • •
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OC368B--1.qxp 07.6.20 1:01 PM Page 16 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields. The unit is in 6-minute resume prevention 3 Low-load (low temperature) mode if pipe temp
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OC368B--1.qxp 07.6.20 1:01 PM Page 17 Abnormal point and detection method Countermeasure Error Code Cause Pipe temperature thermistor / 1 Defective thermistor 1–3 Check resistance value of thermistor. Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. 1 The unit is in 3-minute resume protec- 2 Check contact failure of connector (CN29) 2 Contact failure of connector on the indoor controller board. Refer to 10-6. tion mode if short/open of thermistor is (CN29)
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OC368B--1.qxp 07.6.20 1:01 PM Page 18 Abnormal point and detection method Countermeasure Error Code Cause Indoor/outdoor unit communication * Check LED display on the outdoor control cir- 1 Contact failure, short circuit or, error (Signal receiving error) cuit board. (Connect A-control service tool, miswiring (converse wiring) of 1 Abnormal if indoor controller board PAC-SK52ST.) indoor/outdoor unit connecting cannot receive any signal normally for 6 Refer to EA-EC item if LED displays EA-EC.
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OC368B--1.qxp 07.6.20 1:01 PM Page 19 10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off. door unit. supply terminal block (L1,L2). • When AC 208/230V is not detected, check the power wiring to outdoor unit
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OC368B--1.qxp 07.6.20 1:01 PM Page 20 Note: Refer to the manual of the outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is lit. 1 Reconfirm the setting of refrigerant is off. 1 Mis-setting of refrigerant address for outdoor unit (There is no unit corresponding to refrigerant address for outdoor unit. Set the refrigerant address to “0”. address “0”.) (For grouping control system under whi
