Mitsubishi Electric PURY-80TMU Service Handbook page 25

(3) Check points for test run when mounting options
Built-in optional parts
Mounting of drain
water lifting-up
mechanism
Mounting of perme- Check humidifier operations and water
able film humidifier supply status in heating (test run) mode.
(4) Attention for mounting drain water lifting-up mechanism
Work
Disassembling and
assembling of drain
water lifting-up
mechanism
Mounting of float Float switch installed without contacting the
switch drain pan?
Electric wiring
Content of test run
Release connector of pump circuit,
1
check error detection by pouring
water into drain pan water inlet.
After that, connect connector of
2
circuit.
Check pump operations and drain-
3
age status in cooling (test run) mode.
Content of test run
Lead wire from control box not
1
damaged.
Rubber cap properly inserted in to
2
drain water outlet of drain pan?
Insulation pipe of gas and liquid
3
pipes dealt with as shown in the right
figure?
Drain pan and piping cover mounted
4
without gap?
Drain pan hooked on cut projection
5
of the mechanism?
1
No mistakes in wiring?
Connectors connected securely and
2
tightly?
No tension on lead wire when sliding
3
control box?
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.
Check point
1
Float switch moves smoothly.
Float switch is mounted on
2
mounting board straight without
deformation.
Float switch does not contact the
3
copper pipe.
Wiring procedure is exactly followed.
Connector portion is tightly hooked.
–24–
Check point
Insulation pipe
No gap
Result
Result