Error Code [4102]; Error Code [4106] - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-13 Error Code [4131] (When indoor units with FCV are connected)
1. Error code definition
Slightly open indoor unit valve during power cut
2. Error definition and error detection method
On the indoor units to which no power is supplied, when a temperature difference of 10°C or greater is detected between the
return air temperature (TH1) and the inlet water temperature (TH2) continuously for 5 minutes during cooling operation, the
error code [4131] will be displayed, and the system will come to an abnormal stop.
*The detail code indicates the address of the indoor unit in error. (Detail code: Indoor unit address + 100)
3. Cause, check method and remedy
(1) Slightly open indoor unit flow control valve due to pow-
er cut
(2) Thermistor failure
(3) Failure in the indoor unit flow control valve
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Cause Check method and remedy
Turn on the power supply.
Check the thermistor value on the LED.
Check the operation of the flow rate control valve.
See [8-8-4 General Overview on FCV Operation (In-
door unit)] for the valve operation.
BS_07_M