*The temperature readout (either temperature setpoint or indoor ambient) will be replaced by an error code if there is a malfunction. If multiple errors are detected, the display will alternate between each error code.
NOTE:
No history is kept on past error codes.
72
HEATINDICATOR | COOLINDICATOR | TEMPERATURE* | RUN | DEHUMIDIFY MODE | INFRARED SIGNAL RECEIVER |
FIGURE 4: Indoor Unit Front Panel Indicators
TABLE 2:
Problem | Possible Cause | |
Unit does not operate immediately after | Unit control initiates a 3 minute delay at the end of each cycle to protect the compressor from | |
being restarted. | damage. | |
A whoosh or gurgling noise can be heard at | Sometimes, the refrigerant can be heard in the indoor coil when the outdoor unit starts or stops | |
the indoor unit. | operation. This is not a malfunction. | |
Mist is coming out of the indoor unit during | This sometimes happens when the indoor temperature and humidity are very high and the air is | |
cooling operation. | being cooled quickly. The mist will disappear as the indoor temperature and humidity are lowered. | |
A creaking or popping noise can be heard | The plastic components of the indoor units sometimes expand and contract when they are heated | |
when the unit starts or stops. | and cooled. | |
| Are the TIMER ON and TIMER OFF features being used incorrectly? | |
Unit is not operating. | Is power disconnected or has circuit breaker tripped. | |
| Is power shut down? | |
| Is temperature setting correct? | |
| Are either the air inlet or air outlet blocked on the outdoor or indoor unit? | |
System is not cooling (or heating) efficiently. | Is filter dirty? | |
| Is fan at low speed? | |
| Are windows and doors properly shut? | |
Wireless remote is not working. | Is remote in direct line of sight with indoor unit infrared receiver? Has the remote been damaged? | |
Remove remote control batteries for 30 seconds, then reinsert them. Replace batteries, if necessary. | ||
| ||
Water is leaking from indoor unit. | Indoor humidity level is very high and water is being blown from indoor coil. This will stop as humidity | |
level is reduced. | ||
| ||
Water is leaking from condensate line at | Check condensate line outside to make sure it is not obstructed. | |
indoor unit. | Check condensate line to make sure it has not been disconnected from indoor unit. | |
| During operation in high humidity areas, condensate will form on cold outdoor refrigerant pipes. | |
Water is leaking from the outdoor unit. | When heat pump is operating in defrost mode, ice will thaw from around outdoor coil and water will | |
| flow from the unit. | |
Clicking noise heard inside. | Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that | |
makes it seem to be coming from the indoor unit. | ||
| ||
| Heat pump units − In HEAT mode, a timed delay keeps indoor fan off for two minutes to prevent | |
| unheated air from being circulated by the indoor fan. | |
Indoor fan is not working. | Heat pump units − In HEAT mode, cold outdoor temperatures and high humidity cause frost to accu- | |
mulate on the outdoor unit. When this happens, the unit will enter a defrost cycle. The indoor fan is off | ||
| during the 3 − 12 minute cycle. | |
| In DRY mode, indoor fan operation may be stopped to avoid delivery of moist air to the room. | |
| Do not adjust temperature setting. |
8 | Johnson Controls Unitary Products |