SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS March 2009 No.HWE0807A REVISED EDITION-B TECHNICAL & SERVICE MANUAL Indoor unit [Model names] PEA-A12AA PEA-A18AA CONTENTS 1. PART NAMES AND FUNCTIONS ········2 2. SPECIFICATIONS·································4 3. OUTLINES AND DIMENSIONS············9 4. WIRING DIAGRAM ·····························10 5. REFRIGERANT SYSTEM DIAGRAM·······11 Model name 6.
PART NAMES AND FUNCTIONS Indoor Unit PEA-A12AA PEA-A18AA Air outlet Air outlet duct flange Air inlet Wired remote controller Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. ● Operation buttons Start/Stop button Set Temperature buttons Down...
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● Display “Sensor” indication Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit.
SPECIFICATIONS PEA-A12AA PEA-A18AA Model Name Capacity Cooling Heating Cooling Heating BTU/h 12000 17200 20100 Power source 208/230V (60Hz) 208/230V (60Hz) Power input 0.07 0.09 0.07 Current 0.57 0.74 0.63 Temperature set range Remote controller ˚ F( ˚ C) 67 to 86 (19 to 30) 67 to 86 (19 to 30) 63 to 83 (17 to 28) Airflow direction...
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SOUND CRITERION CURVES <60Hz> <60Hz> PEA-A12AA PEA-A12AA NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High External static pressure : External static pressure : Middle Middle 0.020[in.WG](5Pa) 0.060[in.WG](15Pa) NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE TERESHOLD OF TERESHOLD OF HEARING FOR HEARING FOR...
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<60Hz> <60Hz> PEA-A18AA PEA-A18AA NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High External static pressure : External static pressure : Middle Middle 0.020[in.WG](5Pa) 0.060[in.WG](15Pa) NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE TERESHOLD OF TERESHOLD OF HEARING FOR HEARING FOR NC-20...
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INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW PEA-A12AA PEA-A12AA (External static pressure 0.020[in.WG](5Pa) 208/230V 60Hz (External static pressure 0.060[in.WG](15Pa) 208/230V 60Hz [0.20] [0.16] [0.16] [0.12] Limit [0.12] Limit [0.08] High [0.08] High Middle Rated point [0.04] Middle [0.04] Rated point [212] [247] [282]...
HEATER CONTROL 6-1. Control specifications and Function setting Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the Function on the indoor units as shown in Table 1. Table.1 [Function table] Select unit numbers 01 to 03 or all units (AL[wired remote controller] / 07[wireless remote controller]) Mode Setting...
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6-3. PAC-YU25HT (Optional Parts) installation The following section describes installation of the External Heater Adapter that connects to PEA-A AA series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner. (1) Parts list Check that the following parts are included in the package.
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For relay X use the specifications given below Operation coil Rated voltage: 12VDC Power consumption: 0.9W or less * Use the diode that is recommended by the relay manufacturer at both ends of the relay coil. The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.) To extend this length, use sheathed 2-core cable.
TROUBLESHOOTING 7-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: 1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker.
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• If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) For about 2 •For about 2 minutes after power-on,op- After LED 1, 2 are lighted, LED 2 is PLEASE WAIT minutes after...
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Note: Refer to the manual of outdoor unit for the details of display 7-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Abnormal point and detection method Countermeasure Error Code Cause 1 Defective thermistor 1–3 Check resistance value of thermistor. Room temperature thermistor (TH1) characteristics...
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Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. working 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
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Abnormal point and detection method Countermeasure Error Code Cause 1 Defective thermistor 1–3 Check resistance value of thermistor. Abnormality of pipe temperature ther- mistor / Condenser-Evaporator (TH5) For characteristics, refer to (P1) above. characteristics 2 Check contact failure of connector (CN44) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
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Abnormal point and detection method Countermeasure Error Code Cause ∗ Check LED display on the outdoor control cir- 1 Contact failure, short circuit or, Indoor/outdoor unit communication error (Signal receiving error) cuit board. (Connect A-control service tool, mis-wiring (converse wiring) of 1 Abnormal if indoor controller board PAC-SK52ST.) indoor/outdoor unit connecting...
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7-4. 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.
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7-5. TEST POINT DIAGRAM 7-5-1. Indoor controller board PEA-A12AA PEA-A18AA Fuse(6.3A 250V) CN01 Power supply voltage (208 - 230VAC) Emergency operation Model selection Capacity setting CN01 CN32 Remote start/stop adapter CN24 Heater control (12VDC) CN22 For MA remote controller cable con- nection (10 - 13 VDC (Between 1 and 3.)) CN51 Centralized control...
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7-6. TROUBLE CRITERION OF MAIN PARTS PEA-A12AA PEA-A18AA Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C(50°F) ~ 30°C(86°F)) (TH1) Normal Abnormal Pipe temperature 8kΩ~20kΩ Opened or short-circuited thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Wiring diagram...
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7-7. DC FAN MOTOR (FAN MOTOR/ INDOOR CONTROLLER BOARD) Check method of DC fan motor (fan motor / indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Give attention to the service. ·...
DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. PEA-A12AA PEA-A18AA 1. Control box 1. Removing the control box cover (1) Remove the two fixing screws on the cover (A) to remove it. Fig. 1 Fig. 2 2. Thermistor (Intake air) 1.
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Exercise caution when removing heavy parts. 3. Drainpan 1. Removing the filter and the bottom plate (1) Push up the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (D), (E) to remove it.
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Exercise caution when removing heavy parts. 4. Thermistor (Condenser / evaporator) (Liquid pipe) 1. Remove the drain pan according to the proce- dure in section [3]. 2. Removing the Heat exchanger cover (1) Remove the four fixing screws on the heat exchanger cover (F) to remove it.
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Exercise caution when removing heavy parts. 5. Fan and fan motor 1. Removing the filter and the bottom plate (1) Push down the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (J) to remove it.
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Exercise caution when removing heavy parts. 6. Bearing [PEA-A18AA model only] 1. Removing the bearing (1) Remove the two fixing screws on the bearing cover (K) to remove it. Fig. 13 (2) Remove the two bearing retainer screws to remove the bearing. Fig.
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New publication, effective Mar. 2009. Specifications subject to change without notice. HWE0807A First edition published in Oct. 2008.