User Manual for KLIMAIRE models including: KTHM-BC, Packaged Terminal Air Conditioner-Heat Pump, Air Conditioner-Heat Pump, Packaged Terminal Heat Pump, Heat Pump, Pump, Air Conditioner, Conditioner
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DocumentDocumentKTHM PACKAGED TERMINAL AIR CONDITIONER / HEAT PUMP TROUBLESHOOTING Mark of Superior Quality IMPORTANT NOTE: Before using your air conditioner, please read Read this manual carefully before installintghis manual carefully and keep it for future reference. or operating your new air conditioning unit. Make sure to save this manual for future reference. For more information please visit www.klimaire.com 10. Troubleshooting 10.1 Error Display Codes Explanations AS Open or short circuit of T1 temperature sensor ES Open or short circuit of T2 temperature sensor CS Open or short circuit of T3 temperature sensor OS Open or short circuit of T4 temperature sensor HS Open or short circuit of T5 or T6 temperature sensor Lo Temperature is lower than display range (32°F) HI Temperature is higher than display range (99°F) E4 Communication malfunction between main control board and display board LE Drive-by-wire control failure 10.2 Troubleshooting 10.2.1 Open circuit or short circuit of temperature sensor diagnosis and solution (AS/E5/CS/oS/HS). Error Code: AS/ES/CS/OS/HS Malfunctioning conditions: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Possible causes: Wiring mistake Faulty sensor Faulty PCB Troubleshooting: Check the connection between temperature sensor and PCB. It is properly connected? No Correct the connection. Yes Measure the resistance value of the sensor. No Replace the sensor. Yes Replace indoor main PCB. www.klimaire.com 28 T5/T T4 T3 T2 T1 www.klimaire.com 29 10.2.2 Communication malfunction between main control board and display board (E4). Error Code: Malfunctioning conditions: Possible causes: E4 Main control board does not receive feedback from display board during 120 seconds. Wiring error Faulty display board Faulty main control board Troubleshooting: Communication malfunction between main control board and display board Check signal wire between the display board and main board. Is it properly connected? No Yes Reconnect and retry. Is error still showing? Yes Replace display board. Is error still showing? Yes Replace the main control board. No No Trouble is fixed. www.klimaire.com 30 10.2.3 Drive-by-wire controller failure (LE). Error Code: Malfunctioning conditions: Possible causes: LE 1. Electric heating signal or compressor signal is on, but fan signal is off. 2. Electric heating and compressor signals are on, but 4-way valve signal is off. 3. Cooling only models have heating signal, or the 4-way valve and compressor signals are on at the same time. Wiring error Faulty wire controller Wire controller doesn't match Troubleshooting: DIP Switch Terminal FC(L) FC(N) LOW-FAN HI-FAN 4-WAY HEAT2 HEAT1 COMP 24V(N) 24V(L) Designation Front desk control terminal L Front desk control terminal N Low fan speed High fan speed 4-way valve(for heat pump model) Electrical heater 2 Electrical heater 1 Compressor 24VAC terminal N COM 24VAC terminal L 24V Controller GL GH B W (W) Y C R www.klimaire.com 31 Possible Causes UNIT DOES NOT START Unit is unplugged. Blown fuse. Tripped circuit breaker. Unit is turned off. Unit is in a protection mode. UNIT NOT COOLING/HEATING ROOM Air discharge section is blocked. Temperature setting is not high or low enough. Note: Setpoint limits might not allow unit to heat or cool the room to the temperature desired. Check section on DIP switch settings. Air filters are dirty. Room is excessively hot or cold when unit starts. Vent door left open. Unit may be in a protection mode. Compressor is in a time delay. DISPLAY HAS STRANGE NUMBERS/ CHARACTERS ON IT UNIT MAKING NOISES WATER DRIPPING OUTSIDE WATER DRIPPING INSIDE Wall sleeve is not installed properly. ICE OR FROST FORMS ON INDOOR COIL Low outdoor temperature. Dirty filters. COMPRESSOR PROTECTION Power may have cycled, so compressor is in a restart protection. Solutions Check that plug is securely connected to outlet. Note: Plug has a test/reset button on it. Make sure that the plug has not tripped. Replace fuse. See Note 1 below. Reset circuit breaker. See Note 1 below. Turn unit on (bottom right button on keypad). Make sure curtains, blinds, and/or furniture are not restricting or blocking unit's airflow. Reset to a lower or higher temperature setting. Remove and clean filters. Allow sufficient amount of time for unit to heat or cool the room. Start heating or cooling before outdoor temperature, cooking heat, or people make room uncomfortable. Close vent door. Check DIP switch settings for desired comfort. Wait approximately 3 minutes for compressor to start. The unit may be in a protection mode. The unit may have been set for °C instead of °F. Clicking, gurgling, and whooshing noises are normal during operation. If a drain kit has not been installed, condensation runoff during hot and humid weather is normal. See Note 2 below. If a drain kit has been installed and is connected to a drain system, check gaskets and fittings around drain for leaks and plug them. Wall sleeve must be installed correctly for proper drainage of condensation. Check that installation is levelled and make any necessary adjustments. When outdoor temperature is approximately 55°F or below, frost may form on the indoor coil when unit is in Cooling mode. Switch unit to FAN operation until ice or frost melts. Remove and clean filters. Random Compressor Restart: Whenever the unit is plugged in or power has been restarted, a random compressor restart will occur. After a power outage, the compressor will restart after approximately 3 minutes. Compressor Protection: To prevent short cycling of compressor, there is a random startup delay of 3 minutes and a minimum compressor run time of 3 minutes. NOTES 1. If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician. 2. If unit is installed where condensation drainage could drip in an undesirable location, an accessory drain kit should be installed and connected to drain system. www.klimaire.com 32 Characteristics of Temperature Sensor Temp. °C/°F -10/14 Resistance K 62.2756 Temp. °C/°F 17/62 Resistance K 14.6181 -9 /15.8 58.7079 18/64 13.918 -8 /17.6 56.3694 19/66 13.2631 -7 /19.4 52.2438 20/68 12.6431 -6 /21.2 49.3161 21/70 12.0561 -5 /23 46.5725 22/72 11.5 -4 /24.8 44 23/73 10.9731 -3 / 26.6 41.5878 24/75 10.4736 -2 / 28.4 39.8239 25/77 10 -1 /30.2 37.1988 26/79 9.5507 0 /32 35.2024 27/81 9.1245 1 /33.8 33.3269 28/82 8.7198 2 /35.6 31.5635 29/84 8.3357 3 /37.4 29.9058 30/86 7.9708 4 /39.2 28.3459 31/88 7.6241 5 /41 26.8778 32/90 7.2946 6 /42.8 25.4954 33/91 6.9814 7 /44.6 24.1932 34/93 6.6835 8 /46.4 9 /48.2 22.5662 21.8094 35/95 36/97 6.4002 6.1306 10 /50 20.7184 37/99 5.8736 11 /51.8 12 /53.6 13 /55.4 19.6891 18.7177 17.8005 38/100 39/102 40/104 5.6296 5.3969 5.1752 14 /57.2 15 /59 16 /60.8 16.9341 16.1156 15.3418 41/106 42/108 43/109 4.9639 4.7625 4.5705 Temp. °C/°F 44/111 45/113 46/115 47/117 48/118 49/120 50/122 51/124 52/126 53/127 54/129 55/131 56/133 57/135 58/136 59/138 60/140 61/142 62/144 63/145 64/147 65/149 66/151 67/153 68/154 69/156 70/158 Resistance K 4.3874 4.2126 4.0459 3.8867 3.7348 3.5896 3.451 3.3185 3.1918 3.0707 2.959 2.8442 2.7382 2.6368 2.5397 2.4468 2.3577 2.2725 2.1907 2.1124 2.0373 1.9653 1.8963 1.830 1.7665 1.7055 1.6469 www.klimaire.com 33 The Klimaire logo is a registered Trademark of Klimaire Products inc. Copyright 2020 Klimaire Products Inc. 2190 NW 89 Place, Doral, FL 33172 - USA The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details.