Condensate Overflow Safety Switch Connection (Cn4F) - Mitsubishi Electric M-SERIES Installation Manual

NOTE
When CN4Y is used the fan is off when CN24 is energized which is only for use with
supplemental heat that is not in the duct.
13.3. Condensate overlow safety switch connection
(CN4F)
CAUTION
If a heater is installed in the duct, do not use Panel Heater Connector. By doing so, the fan
The circuit board is equipped with a connection to attach a
will turn off when the heater is on, which may result in fire.
condensate safety loat switch. The switch should be a normally
closed low voltage rated switch. The switch should be installed in a
location that it can sense a drain blockage causing a rise in water
• Please see section 14.4. for external static pressure settings. level. This resulting rise in level will cause it to open. The switch
location is to be determined by the installing contractor. When the

14.3. Condensate overflow safety switch connection (CN4F)

switch opens, it will cause the LEV to close, stopping the cooling
The circuit board is equipped with a connection to attach a condensate safety float switch. The switch
operation. The fan will continue to run and a fault code will be shown
should be a normally closed low voltage rated switch. The switch should be installed in a location that it can
sense a drain blockage causing a rise in water level. This resulting rise in level will cause it to open. The
at the controller. Correcting the problem and closing the switch will
switch location is to be determined by the installing contractor. When the switch opens, it will cause the LEV
be required before normal operation can resume.
to close, stopping the cooling operation. The fan will continue to run and a fault code will be shown at the
See installation below:
controller. Correcting the problem and closing the switch will be required before normal operation can
resume. See installation below:
Locate the CN4F connector on the
control board. Carefully remove the
connector with the jumper from the
board. Cut the jumper on the CN4F
connector and wire a normally
closed safety loat switch across
the wires. Carefully reinstall the
connector back on the board.
When the Normally Closed Float
Switch opens, the Indoor unit will
turn off.
© 2020 Mitsubishi Electric US, Inc.
SVZ-KP12,18, 24, 30, 36NA
44 Specifications are subject to change without notice.
13.4. Chan
The air hand
setting. The
Model
MVZ-A12
MVZ-A18
MVZ-A24
MVZ-A30
MVZ-A36
*MVZ-A36 in
The air hand
The air hand
function setti
manual for th
on the contro
(PAR-31 & S
there are diff
downlow po
Vertical, Ho
Pressure S
External S
Pressure