Mitsubishi Electric CITY MULTI PUHY-400YMF-B, Service Handbook

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(3) Check points for test run when mounting options
(4) Attention for mounting drain water lifting-up mechanism
Built-in optional parts Content of test run Check point Result
Mounting of drain
water lifting-up
mechanism
Mounting of perme-
able film humidifier
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 drainage
status in cooling (test run) mode.
Check humidifier operations and
water supply status in heating (test
run) mode.
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 leak from connecting portions
of each water piping.
Water is supplied to water supply tank,
and float switch is operating.
Work Content of test run Check point Result
Disassembling and
assembling of drain
water lifting-up
mechanism
Mounting of float
switch
Electric wiring
Lead wire from control box not
damaged.
Rubber cap properly inserted to drain
water outlet of drain pan?
Insulation pipe of gas and liquid pipes
dealt with as shown in the right
figure?
Drain pan and piping cover mounted
without gap?
Drain pan hooked on cut projection of
the mechanism?
Float switch installed without contacting
with drain pan?
No mistakes in wiring?
Connectors connected surely and
tightly?
No tension on lead wire when sliding
control box?
No gap
Float switch moves smoothly.
Float switch is mounted on mount-
ing board straightly without defor-
mation.
Float switch does not contact with
copper pipe.
Wiring procedure is exactly followed.
Connector portion is tightly hooked.
1
2
3
1
2
3
4
5
1
2
3
1
2
3
Insulation pipe