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(3) Check points for test run when mounting options
(4) Attention for mounting drain water pump mechanism
Check point
Local remote controller displays code
No. “2503”, and the mechanism stops.
No overflow from drain pan.
Drain water comes out by operation of
drain pump.
Sound of pump operations is heard, and
drain water comes out.
No water leak from connecting portions
of each water piping.
Water is supplied to water supply tank,
and float switch is operating.
Built-in optional parts
Mounting of drain
water pump
mechanism
Mounting of perme-
able film humidifier
Content of test run
Release connector of pump circuit,
check error detection by pouring
water into drain pan water inlet.
After that, connect connector of
circuit.
Check pump operations and drain-
age status in cooling (test run) mode.
Check humidifier operations and water
supply status in heating (test run) mode.
1
2
3
4
5
Result
1
2
3
Work
Disassembling and
assembling of drain
water pump
mechanism
Mounting of float
switch
Electric wiring
Float switch moves smoothly.
Float switch is mounted on
mounting board straight without
deformation.
Float switch does not contact the
copper pipe.
Wiring procedure is exactly followed.
Connector portion is tightly hooked.
Content of test run
Lead wire from control box not
damaged.
Rubber cap properly inserted in to
drain water outlet of drain pan?
Insulation pipe of gas and liquid
pipes dealt with as shown on next
page?
Drain pan and piping cover mounted
without gap?
Drain pan hooked on cut projection
of the mechanism?
Float switch installed without contacting the
drain pan?
No mistakes in wiring?
Connectors connected securely and
tightly?
No tension on lead wire when sliding
control box?
1
2
3
1
2
3
Check point Result
Insulation pipe
No gap
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16
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