Installation Guide

Page 48mrcool.com
Before calling for service assistance, troubleshoot a problem by performing the following checks:
WARNING
· Signal/power cable is damaged or abnormally warm
· Burning odor
· Loud or abnormal sounds
· A power fuse or circuit breaker trips frequently
· Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO CORRECT
OR FIX THESE ITEMS YOURSELF!
CONTACT AN AUTHORIZED
SERVICE PROVIDER
IMMEDIATELY!
In the case of any of the following, turn off the unit immediately!
Poor Cooling
Performance
The unit is
not working
The unit starts
and stops
frequently
Poor heating
performance
Symptom SolutionPossible Causes
The heat exchanger on the indoor or
outdoor unit is dirty.
The air filter is dirty.
The air inlet or outlet of either unit is
blocked.
Doors and windows are open.
Excessive heat is generated by sunlight.
Too many other sources of heat in the
room (people, computers, electronics, etc.)
Low refrigerant due to a leak or long-term
use.
SILENCE function is activated (optional
feature).
Power failure Wait for power to be restored
Turn on the power
Replace the fuse
Replace the batteries
Wait three minutes after restarting
the unit
Turn timer off.
Check for leaks and recharge the
system with refrigerant.
Evacuate and recharge the system
with refrigerant.
The power is turned off
The fuse is burned out
Remote control batteries are dead
The unit’s 3 minute protection feature has
been activated
Timer is activated
There’s too much or too little refrigerant
in the system
Incompressible gas or moisture has
entered the system.
The compressor is broken.
The voltage is too high or too low.
The outdoor temperature is extremely low.
Cold air is entering through doors and
windows
Low refrigerant due leak or long-term use
Replace the compressor.
Install a manostat to regulate the
voltage.
Use auxiliary heating device.
Make sure that all doors and windows
are closed during use.
Check for leaks, re-seal if necessary
and top off refrigerant
Clean the affected heat exchanger
Remove the filter and clean it
according to the instructions.
Turn the unit off, remove the
obstruction and turn it back on.
Ensure all windows and doors are
closed while operating the unit.
Close windows and curtains during
periods of high heat or bright
sunshine.
Reduce the amount of heat sources
Check for leaks, reseal if necessary
and top off the refrigerant level.
The SILENCE function can lower
product performance by reducing
operating frequency. Turn off the
SILENCE function.
Temperature setting may be higher than
ambient room temperature.
Lower the temperature setting