Mitsubishi Electric CITY MULTI PUHY-400YMF-C Service Handbook page 46

(3) Check points for test run when mounting options
Built-in optional parts
Mounting of drain
1
water lifting-up
mechanism
2
3
Mounting of perme-
able film humidifier
(4) Attention for mounting drain water lifting-up mechanism
Work
Disassembling and
1
assembling of drain
water lifting-up
mechanism 2
3
4
5
Mounting of float Float switch should be installed without
switch contacting with drain pan?
Electric wiring
1
2
3
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 drainage
status in cooling (test run) mode.
Check humidifier operations and
water supply status in heating (test
run) mode.
Content of test run
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?
No mistakes in wiring?
Connectors connected securely and
tightly?
No tension on lead wire when sliding
control box?
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.
Float switch moves smoothly.
1
Float switch is mounted on mount-
2
ing board straight without deforma-
tion.
Float switch does not contact with
3
copper pipe.
Wiring procedure is exactly followed.
Connector portion is tightly hooked.
-43-
Check point
Insulation pipe
No gap
Result
Result