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Table 10. MLB and MPC Single-Zone Outdoor Unit
Error Codes
Display
PH90 High temperature protection of Evaporator
PH91 Low temperature protection of Evaporator
LC06 High temperature protection of Inverter module (IPM)
Self Clean Feature
For units that use the provided wireless remote control,
there is a button labeled “self clean”. Press to activate self
cleaning mode. In cooling or dry mode only, the indoor
unit will temporarily change operation to allow condensate
on the indoor unit coil to evaporate, and then will turn off.
During this operation, code SC will display on the indoor
unit.
The sequence of operation for the self-clean function is
illustrated below.
Figure 45. Self Clean
Test Run
Pre-Checks
Only perform test run after you have completed the
following steps:
• Electrical Safety Checks – Conrm that the unit’s elec-
trical system is safe and operating properly
• Refrigerant Leak Checks – Check all are nut connec-
tions and conrm that the system is not leaking
• Conrm that liquid and gas valves are fully open
Procedure
You should perform the Test Run for at least 30 minutes.
1. Connect power to the unit.
2. Press the ON/OFF button on the remote controller to
turn it on.
3. Press the mode button to scroll through the following
functions, one at a time:
• COOL - Select lowest possible temperature
• HEAT - Select highest possible temperature
4. Let each function run for 5 minutes, and perform the
following checks:
Pass Fail
No electrical leakage
Unit is properly grounded
All electrical terminals
properly covered
Indoor and outdoor units are
solidly installed
All pipe connection points do
not leak
Outdoor
(2):
Indoor
(2):
Water drains properly from
drain hose
All piping is properly
insulated
Unit performs COOL function
properly
Unit performs HEAT function
properly
Indoor unit louvers rotate
properly
Indoor unit responds to
remote controller
Dry Mode Operation (Dehumidication)
Procedure
1. Using the provided wired remote control, press the
MODE button and select DRY mode.
2. Press the UP/ DOWN button to select the desired
temperature. The temperature setting range is from
62°F (17°C) to 86°F (30°C) in one degree increments.
NOTE: The blower is preset at a low speed and cannot be
changed therefore it will get cold and most likely
will surpass the temperature setting and will run
down to 50°F (10°C) room temperature depending
on the room size or other various factors. Also the
Follow Me mode does not operate in this mode.
NOTE: In addition, the indoor units do not have a humidistat
installed therefore they are unable to determine
humidity levels. This product is not recommend as
a main source for dehumidication.
Sequence of Operation
When in dry mode operation the unit is actually in cooling
mode with a low speed blower operation. Set remote temp
to a lower room temp to begin the dry mode operation. The
compressor will stop when the room temperature is 50°F
(10°C) lower than the temperature setting.
System will not resume unit until room temperature rises
above 53.6°F (12°C).
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