Mitsubishi Electric PUHY-P200 Service Handbook page 104

Checking code Meaning, detecting method
2502 Drain pump When drain sensor detects
abnormality flooding during drain pump ON
(This error in the stopped indoor unit.
occurs for all
the indoor
units in the
same
refrigerant
system.)
2503 Drain sensor When short circuit or open
abnormality circuit is detected during
operation (cannot be detected
during OFF).
Short circuit:
detected 90˚C or more
Open circuit:
detected –20˚C or less
2600 Water
leakage
2601 Water-supply
cut
(1) Drain pump malfunction
(2) Clogged drain pump intake
(3) Clogged drain pipe
(4) Return water from drain pipe
(installation defect)
(1) Thermistor failure
(2) Connector contact failure
(Insert failure)
(3) Disconnected wire or partial
disconnected wire for
thermistor
(4) Indoor board (detection
circuit) failure
Water leaks from the pipes in
–
such as the humidifier.
(1) Water is not supplied into the
–
humidification feed tank.
(2) The solenoid valve for
humidification is OFF.
(3) Float switch disconnection.
(4) Float switch malfunction.
(5) Freeze on the feed tank.
- 102 -
Cause Checking method & Countermeasure
Refer to the previous page.
<Error release method>
Reset the power of the
applied indoor unit. However,
the reset (error reset) using
the remote controller can be
done in 10 minutes after the
power has been reset.
Furthermore, the reset using
the remote controller is
required for all the indoor
units.
Thermistor resistance check
10˚C : 3.9kΩ
20˚C : 2.6kΩ
30˚C : 1.8kΩ
40˚C : 1.3kΩ
Connector contact failure
If no fault is found, indoor board
is faulty.
Check the place from where the
water leaks.
Check the amount of supply water.
Check the solenoid valve or
connection.
Check the connector.
Check the connecting part.
Check the defective float switch.
Defrost by turning the power off
and turn the power on again.
0˚C : 6.0kΩ