Error Code Definitions And Solutions: Codes [3000 - 3999]; Error Code [3511] - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[7-5 Error Code Definitions and Solutions: Codes [3000 - 3999] ]

7-5

Error Code Definitions and Solutions: Codes [3000 - 3999]

7-5-1

Error Code [3511]

1. Error code definition
Refrigerant overcooling
2. Error definition and error detection method
1) If the condition "THHS ≤ A
ation, the outdoor unit will stop, go into the 20-second restart delay mode, and then automatically resume operation after 20
seconds have passed.
2) If the condition "THHS ≤ A
within 30 minutes of the first stoppage of the outdoor unit explained above, the outdoor unit will stop, go into the 20-second
restart delay mode, and then automatically resume operation after 20 seconds have passed.
3) If the condition "THHS ≤ A
30 minutes of the second stoppage of the outdoor unit explained above and before the condition "THHS > A
for continuous 2 minutes" has been met, the unit will come to an abnormal stop, and this error will be indicated as "3511."
4) If the condition "THHS ≤ A
time) after 30 minutes of the first occurrence or after the condition "THHS > A
been met, it is considered as the first occurrence, and the unit will follow the same behavior as the one described in item 1)
above.
5) For 30 minutes after the stoppage of the outdoor unit, or the period up to the time when the condition "THHS > A
true for continuous 2 minutes" has been met is considered as a preliminary error, and this state will be indicated on the LED.
*1 During cooling: A = Outside temperature TH7
3. Cause, check method and remedy
(1) Outdoor unit LEV9 malfunction
(2) THHS failure
(3) Thermistor failure (TH7)
(4) Low-pressure sensor fault
BS_07_C
*1
°C remains true for continuous 6 minutes and 30 seconds" is met (for the first time) during oper-
*1
°C remains true for continuous 6 minutes and 30 seconds" is met again (for the second time)
*1
°C remains true for continuous 6 minutes and 30 seconds" is met again (for the third time) within
*1
°C remains true for continuous 6 minutes and 30 seconds" is met (regardless of the first or second
Cause
*1
°C remains true for continuous 2 minutes" has
Check method and remedy
Check the operation of unit in the Cooing mode.
LEV9
Refer to [8-8 Troubleshooting LEV Problems].
1) Check the IGBT on the INV board for proper mounting.
2) Check the THHS sensor reading on the LED.
→ Replace the INV board if the THHS value is abnormal.
Resistance value of the thermistor
Refer to [8-5 Pressure Sensor Circuit Configuration and
Troubleshooting Pressure Sensor Problems]
*1
°C remains true
*1
°C remains
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