Error Code Definitions And Solutions: Codes [2000 - 2999]; Error Code [2503] - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ]

7-4

Error Code Definitions and Solutions: Codes [2000 - 2999]

7-4-1

Error Code [2503]

1. Error code definition
Float switch trip
2. Error definition and error detection method
This error is detected if the float switch trips during operation and open-circuit (-40°C [-40°F] below) is detected continuously
for 30 seconds. (Normal operation will be resumed in 20 seconds if open-circuit is no longer detected before the 20 seconds
have elapsed.)
3. Cause, check method and remedy
(1) Faulty connector (CN31) insertion.
(2) Broken or partially broken float switch wire
(3) Float switch failure
(4) Indoor unit control board (error detection circuit)
failure
10
- chapter 7
Cause Check method and remedy
1) Check for connector connection failure.
Reinsert the connector, restart the operation, and check for
proper operation.
2) Check for broken float switch wire.
3) Check the resistance of the float switch.
250 mΩ below
4) Operate the unit with pins No. 1 and No. 2 of connector
CN31 short-circuited. If the problem recurs, replace the in-
door unit control board.
If the above item checks out OK, there are no problems with
the drain sensor.
Turn off the power and turn it back on.
BS_07_C