5
Troubleshooting
IMPORTANT
If any of the following conditions exist, immediately
turn the system (indoor and outdoor units) off at the
unit disconnect switch and call a licensed professional
HVAC technician (or equivalent) for repairs:
The system does not receive a signal from the wireless
remote control or wired controller.
The wireless remote control or wired controller indicate
a system malfunction.
Water is leaking into the room from the indoor unit.
The circuit breaker trips or the fuse blows frequently.
Water or some other liquid has been spilled on or
splashed into the indoor unit.
NORMAL OPERATION
If none of the above conditions exist, check the following
items before calling for repairs. This can save you both
time and money. The follow ing are signs of normal system
operation.
System does not operate on command
The indoor fan does not start immediately after the ON/
OFF button on the wireless remote control is pressed.
• On an initial call for cooling, the operation/run light is lit
to signal normal operation. There will be a delay after
a cooling demand is introduced be fore unit operation
begins. This delay protects the unit compressor and is
normal.
• When a heating demand is initiated, the opera tion light
is lit to signal normal operation. The PRE-DEF indica-
tor may be lit as well. The indoor unit fan will not oper-
ate until the indoor coil reaches a pre-set temperature.
This prevents the delivery of cold air into the space
and is nor mal.
Indoor fan is on; compressor is off
In certain normal operating modes, the indoor fan is on
when the compressor is not operating.
• The system turns the compressor off and leaves the
indoor fan on when the indoor coil falls to a preset tem-
perature. This is normal operation and will prevent the
indoor coil from freezing.
• When the indoor fan is set for continuous opera tion,
the fan continues to run when the temperat ure setting
is reached and the compressor is de-energized.
White mist comes out of the indoor unit
• During cooling operation,
if the indoor relative hu-
midity is very high and the indoor unit dis charge air
louvers are very dirty, the indoor coil may freeze and
a white mist (frozen vapor) may appear to come from
the indoor unit. I
n this case, though the unit is not
in need of repair, it does need to be cleaned by a
licensed pro fessional HVAC technician (or equiv-
alent).
• During heating operation
when the operation
mode switches from defrost to heating,
mois ture
generated by the defrost process becomes steam and
may be seen as it is blown out of the indoor unit.
Sounds can be heard near the indoor unit
During certain parts of the heating or cooling pro cess,
low swishing or groaning sounds may be heard near the
unit as the system pressures equal ize. This is a normal
occurrence.
The table below lists possible causes and solutions to
some of the most common problems. Please review this
information before calling for service.
Summary of Contents for M22A
Page 8: ...8...
