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898147-UUM-B-0713
8 Johnson Controls Unitary Products
FIGURE 4: Indoor Unit Front Panel Indicators
72
HEAT INDICATOR
COOL INDICATOR
TEMPERATURE*
RUN
DEHUMIDIFY
MODE
INFRARED
SIGNAL
RECEIVER
* 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.
TABLE 2:
Problem Possible Cause
Unit does not operate immediately after
being restarted.
Unit control initiates a 3 minute delay at the end of each cycle to protect the compressor from
damage.
A whoosh or gurgling noise can be heard at
the indoor unit.
Sometimes, the refrigerant can be heard in the indoor coil when the outdoor unit starts or stops
operation. This is not a malfunction.
Mist is coming out of the indoor unit during
cooling operation.
This sometimes happens when the indoor temperature and humidity are very high and the air is
being cooled quickly. The mist will disappear as the indoor temperature and humidity are lowered.
A creaking or popping noise can be heard
when the unit starts or stops.
The plastic components of the indoor units sometimes expand and contract when they are heated
and cooled.
Unit is not operating.
Are the TIMER ON and TIMER OFF features being used incorrectly?
Is power disconnected or has circuit breaker tripped.
Is power shut down?
System is not cooling (or heating) efficiently.
Is temperature setting correct?
Are either the air inlet or air outlet blocked on the outdoor or indoor unit?
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
indoor unit.
Check condensate line outside to make sure it is not obstructed.
Check condensate line to make sure it has not been disconnected from indoor unit.
Water is leaking from the outdoor unit.
During operation in high humidity areas, condensate will form on cold outdoor refrigerant pipes.
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.
Indoor fan is not working.
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.
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.