KLIMAIRE KTHM-BC Packaged Terminal Air Conditioner-Heat Pump User Manual
- June 9, 2024
- KLiMAiRE
Table of Contents
KLIMAIRE KTHM-BC Packaged Terminal Air Conditioner-Heat Pump
Troubleshooting
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 |
Troubleshooting
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:
Communication malfunction between main control board and
display board (E4).
| Error Code: | E4 |
|---|---|
| Malfunctioning conditions: | Main control board does not receive feedback |
from display board during 120 seconds.
Possible causes:|
- Wiring error
- Faulty display board
- Faulty main control board
Troubleshooting:
Drive-by-wire controller
failure (LE).
| Error Code: | LE |
|---|---|
| Malfunctioning conditions: |
- Electric heating signal or compressor signal is on, but fan signal is off.
- Electric heating and compressor signals are on, but 4-way valve signal is off.
- Cooling only models have heating signal, or the 4-way valve and compressor signals are on at the same time.
Possible causes:|
- Wiring error
- Faulty wire controller
- Wire controller doesn’t match
Troubleshooting:
| DIP Switch Terminal | Designation | 24V Controller |
|---|---|---|
| FC(L) | Front desk control terminal L | |
| FC(N) | Front desk control terminal N | |
| LOW-FAN | Low fan speed | GL |
| HI-FAN | High fan speed | GH |
| 4-WAY | 4-way valve(for heat pump model) | B |
| HEAT2 | Electrical heater 2 | W |
| HEAT1 | Electrical heater 1 | (W) |
| COMP | Compressor | Y |
| 24V(N) | 24VAC terminal N COM | C |
| 24V(L) | 24VAC terminal L | R |
| Possible Causes | Solutions |
|---|
UNIT DOES NOT START
Unit is unplugged. Blown fuse.
Tripped circuit breaker. Unit is turned off.
Unit is in a protection mode.
| 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).
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.
| 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.
DISPLAY HAS STRANGE NUMBERS/ CHARACTERS ON IT| The unit may be in a
protection mode.
The unit may have been set for °C instead of °F.
UNIT MAKING NOISES| Clicking, gurgling, and whooshing noises are normal
during operation.
WATER DRIPPING OUTSIDE| 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.
WATER DRIPPING INSIDE
Wall sleeve is not installed properly.| Wall sleeve must be installed
correctly for proper drainage of condensation. Check that installation is
levelled and make any necessary adjustments.
ICE OR FROST FORMS ON INDOOR COIL
Low outdoor temperature. Dirty filters.| 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.
COMPRESSOR PROTECTION
Power may have cycled, so compressor is in a restart protection.| 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
- If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician.
- 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.
Characteristics of Temperature Sensor
Temp. °C/°F| Resistance
KΩ| Temp. °C/°F| Resistance
KΩ| Temp. °C/°F| Resistance
KΩ
---|---|---|---|---|---
-10/14| 62.2756| 17/62| 14.6181| 44/111| 4.3874
-9 /15.8| 58.7079| 18/64| 13.918| 45/113| 4.2126
-8 /17.6| 56.3694| 19/66| 13.2631| 46/115| 4.0459
-7 /19.4| 52.2438| 20/68| 12.6431| 47/117| 3.8867
-6 /21.2| 49.3161| 21/70| 12.0561| 48/118| 3.7348
-5 /23| 46.5725| 22/72| 11.5| 49/120| 3.5896
-4 /24.8| 44| 23/73| 10.9731| 50/122| 3.451
-3 / 26.6| 41.5878| 24/75| 10.4736| 51/124| 3.3185
-2 / 28.4| 39.8239| 25/77| 10| 52/126| 3.1918
-1 /30.2| 37.1988| 26/79| 9.5507| 53/127| 3.0707
0 /32| 35.2024| 27/81| 9.1245| 54/129| 2.959
1 /33.8| 33.3269| 28/82| 8.7198| 55/131| 2.8442
2 /35.6| 31.5635| 29/84| 8.3357| 56/133| 2.7382
3 /37.4| 29.9058| 30/86| 7.9708| 57/135| 2.6368
4 /39.2| 28.3459| 31/88| 7.6241| 58/136| 2.5397
5 /41| 26.8778| 32/90| 7.2946| 59/138| 2.4468
6 /42.8| 25.4954| 33/91| 6.9814| 60/140| 2.3577
7 /44.6| 24.1932| 34/93| 6.6835| 61/142| 2.2725
8 /46.4| 22.5662| 35/95| 6.4002| 62/144| 2.1907
9 /48.2| 21.8094| 36/97| 6.1306| 63/145| 2.1124
10 /50| 20.7184| 37/99| 5.8736| 64/147| 2.0373
11 /51.8| 19.6891| 38/100| 5.6296| 65/149| 1.9653
12 /53.6| 18.7177| 39/102| 5.3969| 66/151| 1.8963
13 /55.4| 17.8005| 40/104| 5.1752| 67/153| 1.830
14 /57.2| 16.9341| 41/106| 4.9639| 68/154| 1.7665
15 /59| 16.1156| 42/108| 4.7625| 69/156| 1.7055
16 /60.8| 15.3418| 43/109| 4.5705| 70/158| 1.6469
The Klimaire logo is a registered Trademark of Klimaire Products inc. Copyright 2020 Klimaire Products Inc.
2190 NW 89 Place, Doral, FL 33172 – USA
Tel: (305)594-4972
www.klimaire.com
Fax 305-675-2212
[email protected]
The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details.