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5 Confirming drain discharge
Make sure that the drain-up mechanism operates normally
for discharge and that there is no water leakage from the
connections.
• Be sure to confirm the above in a period of heating operation.
• Be sure to confirm the above before ceiling work is done in the
case of a new construction.
• Make sure that water is not leaking from the connection (e) on
the drain pump shown in the right figure.
5-1. Fill water into the feed water pump using a feed water tank. In filling, be sure to put the end of the pump or
tank in a drain pan. (If the insertion is incomplete, water may flow over the machine.)
Do not splash water on the drain pump coil or the float switch wire through hole when pouring water.
5-2. Perform the test run in cooling mode, or turn on the switch SWE on the controller circuit board. (The drain
pump and the fan are forced to operate without any remote controller operation.) Make sure using a transpar-
ent hose that drain is discharged.
SEZ model
SWE
ON
OFF
ON
5-3. After confirmation, cancel the test run mode, and turn off the main power. When the switch SWE has been
turned on, turn it off, and attach the CONTROL BOX COVER and the DRAIN PUMP COVER in the original
positions.
SEZ model
SWE
ON
OFF
ON
B
A
C
A
B
C
D
PEFY model
SWE
SWE
OFF
OFF
ON
PEFY model
SWE
SWE
OFF
OFF
ON
D
Insert pump's end 2 to 4 cm.
About 2000 cc
Water
Do not splash water on the drain pump coil or the
float switch wire through hole when pouring water.
SWE
OFF
ON
SWE
OFF
ON
<Indoor board>
7
(e)
SWE
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