Error Code [2501] (Water Pump Fault) - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ]
7-4-3

Error Code [2501] (Water pump fault)

1. Error code definition
Pump water supply cutoff
2. Error definition and error detection method
1) The pressure differential of less than 10 kPa as obtained from the pressures taken before and after Pump 1 (Pw2-Pw1) was
detected three times in a row while Pump 1 is in operation.
2) The pressure differential of less than 10 kPa as obtained from the pressures taken before and after Pump 2 (Pw4-Pw3) was
detected three times in a row while Pump 2 is in operation.
3) Pump 1 outlet water temperature (TH35) of 70°C or above was detected three times in a row.
4) Pump 2 outlet water temperature (TH34) of 70°C or above was detected three times in a row.
3. Cause, check method and remedy
(1) Pump operation failure
(2) Air-vent failure
BS_07_M
Cause Check method and remedy
Refer to [8-9-4 Water Pump Control]
1) Make sure the air vent valves are located in appropriate
locations. Refer to [8-14-3 Instructions for the Air Vent
Operation].
2) Vent the air again in accordance with the procedures ex-
plained in [8-14-3 Instructions for the Air Vent Opera-
tion].
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