Mitsubishi Electric CITY MULTI PUHY-P200YEM-A Service Handbook page 45

(3) Check points for test run when mounting options
Built-in optional parts
Mounting of drain
water removing
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 removing
mechanism
Mounting of float Float switch is installed without contacting
switch the 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
1 Lead wire from the control box is not
damaged.
Rubber cap is properly inserted into
2
drain water outlet of the drain pan?
Insulation of gas and liquid
3
pipe is dealt with as shown in the
right figure?
Drain pan and piping cover are
4
mounted 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
on control box?
Local remote controller displays code
No. "2503", and the mechanism stops.
No overflow from drain pan.
Drain water comes out by operations of
drain pump.
Sound of pump operations is heard, and
drain water comes out.
No water leakage from connecting
portions of water piping.
Water is supplied to water supply tank,
and float switch is operating.
1
Float switch moves smoothly.
Float switch is mounted on
2
mounting board straigh and
without deformation.
Float switch has no contact with
3
copper pipe.
Wiring procedure is exactly followed.
Connector portion is tightly hooked.
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Check point
Check point
Insulation pipe
No gap
Result
Result