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39

PTEC-M-1A

Control Board
Characteristics and
Diagnostics

On Board Diagnostics

 

-The LED

light will flash once every 6
seconds. If an error occurs the LED
will flash from 2 to 8 flashes every
6 seconds. Refer to the chart below
for possible causes for the flash
codes.

Flashes

Situation

Corrective Action

1 Flash

Control Ok

Board OK

2 Flashes

24vac Fuse Blown

Replace fuse

3 Flashes

Indoor Coil Thermistor failure

Replace Indoor Coil Thermistor

4 Flashes

Mode Switch Failure

Replace Board

5 Flashes

Thermostat Control

Replace Board

6 Flashes

Bad Thermostat Input Failure

Replace Board

8 Flashes

Indoor Ambient Thermistor Failure

Replace Thermistor

Self diagnostic Mode

 

- The

diagnostic mode is initiated by the
following routine. Set the
thermostat in the coolest position
and the mode switch in the off
position. Rotate the thermostat
counterclockwise to the warmest
setting and rotate the mode switch
counterclockwise to the fan only
position simultaneously and wait
two seconds (or until fan relay
engages). Return the thermostat
and mode switch to their starting
positions by rotating them both
clockwise simultaneously. The
diagnostic routine will run the unit
through each mode in the
following sequence:

Mode

Time

Fan Only

17

Off

1

High Cool

17

Off

3

(reversing valve energize)

High Heat
(rev cycle)

17

Off

1

Low Heat
(elec heat)

5

Summary of Contents for PTEC-070

Page 1: ...Conditioner PTEC M 1A Models PTEC and PTHC Units PTEC 070 PTHC 070 7 000 Btuh PTEC 090 PTHC 090 9 000 Btuh PTEC 120 PTHC 120 12 000 Btuh PTEC 150 PTHC 150 15 000 Btuh Cooling Electric Heat and Heat P...

Page 2: ...fully WARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation which if not avoided may resu...

Page 3: ...ral Information Performance Data Chassis Information Maintenance Refrigeration System Component Tests Control Board Characteristics and Diagnostics Disassembly Diagnostic Charts Schematic Diagrams 4 9...

Page 4: ...ate refrigerants as a trace gas Evacuation prior to charging should be done with a vacuum pump capable of pulling a vacuum of 1 000 microns 1 0 mm of mercury or less The unit should stand for 12 hours...

Page 5: ...n added to the product to assist the service department in identifying any given product It is extremely important when looking up service repair parts in the parts list or when requesting service inf...

Page 6: ...uality products It is possible however that during its lifetime a product may require service Products should be serviced only by a qualified service technician who is familiar with the safety procedu...

Page 7: ...te power surges after a power outage the unit is equipped with a two to four minute random restart delay feature Whenever the unit is plugged in with the master switch turned on and the mode switch se...

Page 8: ...ature for the appropriate voltage and amperage selections if applicable For additional details and illustrations of the accessories refer to the catalog or the particular installation manual General I...

Page 9: ...5 615 785 805 805 1110 1120 1120 1485 1505 1505 EER 11 5 11 5 11 5 11 2 11 2 11 2 10 7 10 7 10 7 9 3 9 3 9 3 Unit without Electric Heater Min Circuit Ampacity 2 4 4 0 4 0 3 6 5 1 5 1 4 4 6 4 6 4 5 7 8...

Page 10: ...11700 32 5300 5500 5500 6500 6600 6600 8400 8600 8600 10700 10800 10800 27 5000 5200 5200 6000 6100 6100 7700 7900 7900 9900 10000 10000 24 4800 5000 5000 5700 5800 5800 7300 7500 7500 9400 9500 9500...

Page 11: ...ric heaters is 15 amps Overcurrent protection on 265 volt models must be cartridge style time delay fuses included and factory installed on Trane chassis 4 Total watts for 7 000 and 9 000 Btu models a...

Page 12: ...g the thermostat control clockwise will provide a cooler room temperature turning it counterclockwise will provide a warmer room temperature Adjusting the thermostat to the mid setting vertical will s...

Page 13: ...heat mode Remote Control Inputs The C R GH GL W2 Y W1 and B terminals provide control inputs for a remote wall mounted thermostat For remote control operation refer to Remote Thermostat Operation sect...

Page 14: ...ling Temperature Limiting The temperature limits are set by configuring the DIP switch bank at the lower right hand corner of the control board to the proper settings These settings will depend on the...

Page 15: ...r Hydronic Heat Installations To avoid the risk of freezing the steam or water coil during prolonged shutdown periods the vent door must be left closed when the outdoor temperature might fall below fr...

Page 16: ...arge air grille to the cabinet front 4 Rotate the grille 180 end for end 5 Reinstall the nuts securing the discharge air grille to the cabinet front Reinstall the cabinet front on the unit Remote Ther...

Page 17: ...n Do not install the thermostat where it may be affected by the following Dead spots behind doors in corners or under cabinets Hot or cold drafts from air ducts Radiant heat from the sun appliances or...

Page 18: ...r electric strip heat ON the fan runs continuously regardless of any other settings The table below summarizes the thermostat input combinations and the respective unit functions The following figures...

Page 19: ...1500 ft 16 2000 ft Remote Temperature Sensing With control functions remaining at the unit the remote temperature sensing feature is a unique accessory capable of providing accurate sensing of room te...

Page 20: ...or detergent Under no circumstances should hydrocarbon based cleaners e g acetone benzene naphtha gasoline etc be used to clean the front or outdoor air grilles Use care when cleaning the control are...

Page 21: ...se box or circuit breaker If unit is operated with vent door closed the vent filter does not need to be cleaned 1 Remove the cabinet front as described in Front Removal 2 Remove the six screws securin...

Page 22: ...PTEC M 1A 22 Refrigeration System PTEC Refrigeration System...

Page 23: ...23 PTEC M 1A Refrigeration System Refrigeration Sealed System Heat Pump Air Conditioning Model Refrigeration Sealed System Heat Pump Heat Pump Model...

Page 24: ...ction for capacity test procedure A step by step procedure for determining source of trouble suggested method and normal values are provided in the Diagnosis Charts Service operations requiring openin...

Page 25: ...oap suds may also be used Note The flame of the halide detector will glow green in the presence of R22 refrigerant If a leak is detected do not attempt to apply more brazing material to the joint Reco...

Page 26: ...and charging cylinder 2 Connect the low side line to the process tube of the compressor 3 Connect the high side line to the process tube of liquid line strainer Note If either process tube is not lon...

Page 27: ...aporator and condenser compartments causing the fan motor to over heat and the refrigeration system to become unbalanced will occur when the unit is not installed in the wall sleeve Refrigeration Syst...

Page 28: ...fected by body heat or changes in air flow Therefore the thermometers must be secured in proper locations with masking tape wire or other applicable retainers 3 Readings should be observed without tou...

Page 29: ...s indicated below were obtained 1 Return air D B temperature 80 F Step A 2 Discharge air D B temperature 69 F Step B 3 Return air wet and dry bulb temperature as recorded in Step C Dry Bulb 80 F Wet B...

Page 30: ...s input 1510 3 Wet bulb temperature as described in Step C 75 F In the column headed Outdoor Air Dry Bulb Temperature of the Cooling Wattage Test find the 95 F value Read to the right from the 95 F va...

Page 31: ...input measured by wattmeter Calculating procedure 1 Locate temperature obtained in Step A of cooling performance test in first column of Heating Wattage Chart 2 Locate in second column the inside coil...

Page 32: ...Resistance 2 Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor a Good Condition indicator swings to zero and slowly returns to infinity Start capacitor with bleed resisto...

Page 33: ...e compressor if the compressor terminal cover has been removed or is not firmly in place If the test indicates shorted grounded or open windings see procedure for the next steps to be taken Resistance...

Page 34: ...er wire a test cord to line voltage L1 L2 Note The wire size of the test cord must equal the line size and the fuses in the test line must be of the proper size and type 2 Connect a good capacitor of...

Page 35: ...njury or death disconnect the power before servicing Air and Coil Thermistors With Power Off 1 Remove the indoor coil thermistor leads from the circuit board 2 Check the resistance of the thermistor u...

Page 36: ...operational components tubing vibration or misalignment of case or sleeve with chassis Component Replacement Replacement of the compressor evaporator condenser capillary tubes and reversing valve must...

Page 37: ...he fan running for thirty seconds after the compressor stops in either cooling or heating modes Remote Thermostats Always use an approved thermostat supplied by the manufacturer A wall thermostat that...

Page 38: ...system is trying to reduce its load for a specified time Control Board Characteristics and Diagnostics Sample Before Start The SBS routine is used in the cooling mode This routine runs the unit fan o...

Page 39: ...ailure Replace Board 8 Flashes Indoor Ambient Thermistor Failure Replace Thermistor Self diagnostic Mode The diagnostic mode is initiated by the following routine Set the thermostat in the coolest pos...

Page 40: ...d cover Tilting the control panel out remove the cover 5 Disconnect all wiring to the control board Label the wires to ensure proper reassembly 6 Remove the thermistor in front of the evaporator 7 Rem...

Page 41: ...ol panel cover by pulling upward on the knobs Remove the escutcheon 3 Remove the control panel cover by removing the two screws holding the control panel cover Tilt the control panel forward to gain a...

Page 42: ...e blower inlet panel by removing the two 8 mounting screws See figure below 5 All heater assembly components are now accessible Capacitor 1 Remove front cover 2 Remove control knobs by pulling straigh...

Page 43: ...ay 8 Remove the two screws securing the heater assembly to the evaporator 9 Pull heater assembly up and out of the chassis 10 Disconnect all wiring to the heater assembly and remove the assembly Indoo...

Page 44: ...outdoor thermostat from the outside coil 7 Carefully slide thermostat wiring through the center partition When replacing be sure all holes in the center partition are properly sealed with permagum WA...

Page 45: ...10 Disconnect the blower motor wiring as follows White from capacitor C terminal Red from control board FAN LOW terminal Brown from capacitor FAN terminal Black from control board FAN HIGH terminal Ge...

Page 46: ...e wall sleeve 2 Remove the mounting screw and remove the drain valve WARNING To avoid possible electrical shock personal injury or death disconnect the power before servicing Vent Door 1 Remove Chassi...

Page 47: ...0 1480 1600 65 600 670 770 850 1060 1155 1475 1595 60 595 665 765 845 1055 1150 1460 1580 55 580 655 755 830 1040 1135 1440 1560 85 575 645 730 810 1005 1100 1370 1490 80 580 650 7335 815 1010 1105 13...

Page 48: ...1575 65 590 660 760 840 1060 1155 1455 1570 60 585 665 755 835 1050 1145 1440 1560 55 570 645 745 820 1040 1135 1420 1540 85 560 630 720 800 1010 1105 1355 1475 80 565 635 725 805 1015 1110 1375 1490...

Page 49: ...5 55 24 29 27 32 25 30 25 30 65 9 13 11 15 9 13 9 14 70 60 13 17 15 19 13 17 13 18 55 17 21 19 23 17 21 17 22 Cooling Change of Temperature Air Conditioners Temperature Model Room Air Room Air PTHC070...

Page 50: ...3 0 3 3 2 3 2 5 4 2 4 6 3 5 3 9 5 4 6 0 5 0 5 5 80 2 3 2 5 1 9 2 1 2 9 3 2 2 2 2 4 4 0 4 4 3 3 3 7 5 1 5 7 4 8 5 3 Cooling Amperage Chart Air Conditioner Cond Inlet Air Temperature PTHC0701 PTHC0702 P...

Page 51: ...1350 85 555 600 705 750 985 1065 1265 1400 80 540 585 685 730 960 1040 1240 1370 35 75 525 570 665 710 935 1020 1210 1345 70 510 555 650 695 915 995 1185 1315 65 490 535 630 675 890 975 1155 1290 Hea...

Page 52: ...PTEC M 1A 52 Schematic Diagrams PTEC and PTHC Standard Unit One Stage Heat Temperature Sensor and Front Desk Control Added...

Page 53: ...53 PTEC M 1A Schematic Diagrams PTEC and PTHC Standard Unit Two Stage Heat Temperature Sensor and Front Desk Control Added...

Page 54: ...PTEC M 1A 54 Schematic Diagrams PTEC and PTHC Condensate Pump One Stage Heat...

Page 55: ...55 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump Two Stage Heat...

Page 56: ...PTEC M 1A 56 Schematic Diagrams PTEC and PTHC Power Vent One Stage Heat...

Page 57: ...57 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Vent Two Stage Heat...

Page 58: ...PTEC M 1A 58 PTEC and PTHC Power Door One Stage Heat Schematic Diagrams...

Page 59: ...59 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Door Two Stage Heat...

Page 60: ...PTEC M 1A 60 Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent One Stage Heat...

Page 61: ...61 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent Two Stage Heat...

Page 62: ...PTEC M 1A 62 Schematic Diagrams Hydronic...

Page 63: ......

Page 64: ...ntinuous product and product data improvement and reserves the right to change design and specifications without notice Only qualified technicians should perform the installation and servicing of equi...

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