Mitsubishi Electric PURY-P72 Service Handbook page 199

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I 6 minutes I
[IX Troubleshooting)
1.
Error Code
!I
2500
II
Drain sensor submergence (Models with
a
float switch)
2.
Error definition and error detection method
1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and
when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage. While this error is being
detected, humidifier output cannot be turned on.
2) If the drain pump tums on within one hour after preliminary water leakage is detected and the above-mentioned condition is
detected two consecutive times, water leakage error water leakage is detected, and "2500" appears on the monitor.
3) Detection of water leakage is also performed while the unit is stopped.
4) Preliminary water leakage is cancelled when the following conditions are met:
*One hour after the preliminary water leakage was detected, it is not detected that the drain pump goes from OFF to ON.
*The operation mode is changed to Cool/Dry.
*Liquid pipe temperature - inlet temperature
S -
10°C[-18°F)
3.
Cause, check method and remedy
Cause
Check method and remedy
(1 ) Drain water drainage problem
Check for proper drainage.
-Clogged drain pump
-Clogged drain piping
-Backflow of drain water from other units
(2)
Stuck float switch Check for normal operation of the float switch.
Check for slime in the moving parts of the float
switch.
(3) Float switch failure
Check the resistance with the float switch turned on and
turned off.
<Reference>
Drain pump operation triggered by a submergence of the liquid level sensor
(except dUring the CooinglDry mode)
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I 6 minutes I
Drain pump ON
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output
OFF
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Within 1-hour period
HWE0803A
ON
Float switch
input
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