DC Inverter Multi VRF System
26
6 Common Malfunctions and Troubleshooting
WARNING!
①
If there is abnormal condition (e.g. unpleasant smell), turn unit off and disconnect power
immediately. Then contact
LENNOX
authorized service center. If unit continues operation
despite the abnormal condition, it may get damaged and lead to electric shock or fire hazard.
②
Do not repair the air conditioner by yourself. Improper maintenance may lead electric shock
or fire hazard. Please contact
LENNOX
authorized service center for maintenance.
(1) Please check the items below before calling for maintenance.
Problems
Causes
What to do
Unit doesn’t work.
Fuse or circuit breaker is cut off.
Replace fuse or reset the circuit
breaker.
Power failure.
Restart unit when power is restored.
Power is not connected.
Connect the power.
Remote controller’s power is not enough.
Replace new battery.
Remote controller is out of the control range.
Control range is within 8m.
Unit runs but stops
immediately.
Air inlet or air outlet of indoor and outdoor units is
blocked.
Clear obstructions.
Abnormal cooling or
heating.
Air inlet or air outlet of indoor and outdoor units is
blocked.
Clear obstructions.
Improper temp setting.
Adjust setting at remote controller or
wired controller.
Fan speed is set too low.
Adjust setting at remote controller or
wired controller.
Wind direction is not correct.
Adjust setting at remote controller or
wired controller.
Door or window is open.
Close the door or window.
Direct sunshine.
Draw curtain or louver.
Too many people in the room.
Too many heat resources in the room.
Reduce heat resources.
Filter is blocked and dirty.
Clean the filter.
NOTE!
If problem cannot be solved after checking the above items, please contact
LENNOX
service center
and describe the cases and models.
Summary of Contents for VRF VEC027N432U
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