Mitsubishi LGH-15RX5-E Handbook page 36

(8) Trial operation function
This function operates Lossnay without the need of a device (such as a remote controller, or an external device)
to control Lossnay.
This function permits verification of the connection condition of the AC line and wiring when Lossnay has been
set up.
Also, Lossnay can be forced to operate even when the system is down.
• Trial operation mode
Setting the trial operation switch (SW 2-1) on the Lossnay circuit board to ON will set the High (Extra High) fan
speed operation mode. The damper will be fixed at bypass ventilation for approximately 1 minute, and then the
system will be fixed at Lossnay ventilation.
Control target
Fan Air supply side, and exhaust side fan will both be High (Extra High) fan speed
Damper motor Bypass ventilation (normal ventilation) fixed
* If the Lossnay remote controller or the centralized controller have been set, you can verify on the display of the
LCD that Lossnay is in the trial operation mode.
(9) Night Purge operation
PZ-60DR-E is required to perform night purge operation.
Night purge operation is used in the summer to automatically ventilate a room at night while the air conditioner is
stopped, to discharge accumulated heat and there by reduce the air conditioning load the next morning.
If Night purge is enabled per the "Installation Manual" [5. Function Selection [5] (8)], night purge operation will be
performed based on the flowchart shown in the next page.
From 1:00 A.M. to 6:00 A.M, "Night Purge" indicator is shown on the screen (at 1 ).
• The fan speed will revert to the last setting before the Lossnay unit was stopped.
• Night purge operation is terminated in any of the following conditions (1 to 4), and is not resumed until the
start conditions of the next day are reached.
1 Between 6:00 and 0:59
2 When the operation is stopped between 1:00 and 6:00 with a remote controller or system controller
3 When the operation is switched on or off between 1:00 and 6:00 by a scheduled timer (Weekly timer)
4 When the operation is switched on or off between 1:00 and 6:00 by an air conditioner, an external control
input or a remote input
Note:
• Night purge can be performed when the clock use setting is ON (use clock) in Function Selection.
• The Function Selector cannot be switched during Night purge operation. ("Locked" 2 will blink.)
• Night purge cannot be used with the Simple timer.
• Night purge settings can be checked in the Function Selection mode.
• When more than one Lossnay units are running, the temperature is measured by the "Main" Lossnay.
• Night purge is not performed when "CENTRAL" is displayed.
Operation
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