Error Code Definitions And Solutions: Codes [5000 - 5999] - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]

7-7 Error Code Definitions and Solutions: Codes [5000 - 5999]
7-7-1 Error Code [5102] (Indoor unit)
1. Error code definition
Incorrect pipe connection (indoor unit)
2. Error definition and error detection method
Water inlet and outlet pipes are connected in reverse. (Detected only during commissioning)
1) The formula "Water inlet pipe temperature (TH22) + 4°C < Water outlet pipe temperature (TH23)" is met after at least 15 min-
utes have passed after the operation mode was changed from Cooling/Dry to Heating during commissioning.
2) The formula "Water inlet pipe temperature (TH22) + 4°C < Water outlet pipe temperature (TH23)" is met after at least 10 min-
utes have passed after the operation mode was changed from the mode other than Cooling/Dry to Heating during commis-
sioning.
3) The formula "Water inlet pipe temperature (TH22) > Water outlet pipe temperature (TH23) + 4°C" is met after at least 15 min-
utes have passed after the operation mode was changed from Heating to Cooling/Dry during commissioning.
4) The formula "Water inlet pipe temperature (TH22) > Water outlet pipe temperature (TH23) + 4°C" is met after at least 10 min-
utes have passed after the operation mode was changed from the mode other than Heating to Cooling/Dry during commis-
sioning.
This error may not be detectable under certain operating conditions due to a lack of temperature differential.
3. Cause, check method and remedy
(1) Incorrect water pipe connection
(2) Thermistor failure
(3) Connector contact failure
(4) Disconnected wire or partial disconnected
thermistor wire
(5) Indoor board (detection circuit) failure
48
- chapter 7
Cause Check method and remedy
Check that the water inlet and outlet pipes are not connected
in reverse.
Check the thermistor resistor.
0°C [32°F]: 15 kΩ
10°C [50°F]: 9.7 kΩ
20°C [68°F] : 6.4 kΩ
30°C [86°F] : 4.3 kΩ
40°C [104°F] : 3.1 kΩ
Check the connector contact.
When no fault is found, the indoor board is a failure.
BS_07_M