38MHRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
23
DEFROST Mode
The air conditioning unit enters the DEFROST mode according to the value of temperature of T3 and the value range of temperature change of T3
plus the compressor running time (see Figure 27).
During the DEFROST mode, the compressor keeps running however the indoor and outdoor motors stop.
Forced DEFROSTING Mode:)
1. Press and hold AUTO/COOL for 5s to enter the mode. The indoor fan stops and the defrosting lamp illuminates. Use the remote control to exit this
mode and turn off the unit to stop the normal defrosting mode.
2. To exit the FORCED DEFROSTING mode, press and hold AUTO/COOL for 5s again.
A210643
Fig. 27 —Defrost Chart
Defrost Exit Conditions: Any of the following conditions cancels the DEFROST mode and changes the unit’s operating mode to normal HEATING:
NOTE: T3 temperature refers to the sensor reading at the time when the DEFROST mode begins.
• T3 temperature rises above 59
F (15C).
• T3 temperature remains above 46
F (8C) for more than 80 seconds.
• The unit has been in the DEFROST mode for 10 minutes.
The indoor unit defrost lamp illuminates and the DEFROST logo appears.
To Next Page
Loading...
