Error Code [1302] (During Operation) - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ]
7-3-3

Error Code [1302] (during operation)

1. Error code definition
High pressure fault 1 (Outdoor unit)
2. Error definition and error detection method
1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the outdoor stops once,
turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
2) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor again (the second detection) within 30 minutes after the first
stop of the outdoor unit, the outdoor unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.
3) If the pressure of 3.87MPa [561psi] or higher is detected by the pressure sensor (the 15th detection) within 30 minutes of the 14th stop of the
outdoor unit, the outdoor unit will make an error stop, and the error code "1302" will be displayed.
4) If the pressure of 3.78MPa [548psi] or higher is detected more than 30 minutes after the stop of the outdoor unit, the detection is regarded
as the first detection, and the operation described in step 1 above will start.
5) For 30 minutes after the stop of the outdoor unit, preliminary errors will be displayed on the LED display.
6) The outdoor unit makes an error stop immediately when not only the pressure sensor but also the pressure switch detects 4.15
+0,-22
[601 psi]
3. Cause, check method and remedy
(1) HBC LEV malfunction
Heating only or heating main: LEV1, 2, and 3
Defrost: LEV1, 2, and 3
(2) HBC SV1, 21S4Ma, and 21S4Mb malfunction
→Cooling only or defrost
(3) HBC SV1, 21S4Ma, and 21S4Mb malfunction
→Cooling only or cooling main
(4) HBC SV1, 21S4Ma, and 21S4Mb malfunction →Heating only or heat-
ing main
HBC SV1, 21S4Ma, and 21S4Mb malfunction →Cooling only or cool-
ing main
(5) Actuation failure in the four-way valve (21S4a, 21S4b or 21S4c) or the
expansion valve (LEV2a, LEV2b, LEV2c, or LEV2d) →Cooling-only or
cooling-main
(6) Port address setting error.
(7) Refrigerant service valve actuation failure
(8) Short cycle on the outdoor unit
(9) Dirty heat exchanger of the outdoor unit
(10) Outdoor fan (including fan parts) failure, motor failure, or fan controller
malfunction
Items (8) through (10) above reduce the condensing capability of the
unit, resulting in high-pressure rise during cooling operation.
(11) Solenoid valve (SV1a) malfunction
The by-pass valve (SV1a) can not control rise in high pressure.
(12) Thermistor failure (TH3, TH7)
(13) Pressure sensor failure
(14) Failure of the thermistor input circuit and pressure sensor input circuit
on the controller board
(15) Thermistor mounting problem (TH3, TH7)
(16) Disconnected male connector on the pressure switch (63H1) or dis-
connected wire
(17) Open phase in the power-supply due to improper power-supply wiring
BS_07_M
Cause Check method and remedy
Perform a heating operation and check the operation.
Cooling: Four-way valves
(21S4a, 21S4b, and 21S4c) on the outdoor unit
Expansion valves (LEV2a, 2b, 2c, and 2d)
HBC SV1, 21S4Ma, and 21S4Mb
Heating: HBC SV1, 21S4Ma, and 21S4Mb
Refer to the following page(s). [8-8 Troubleshooting LEV,
FCV Problems]
Confirm the port address of the indoor unit.
Confirm that the refrigerant service valve is fully open.
Check the outdoor units for problems and correct them, if
any.
Check the fan on the outdoor unit.
Refer to the following page(s). [8-7 Troubleshooting Out-
door Unit Fan Problems]
Refer to the following page(s). [8-6 Troubleshooting Sole-
noid Valve Problems]
Refer to the following page(s). [7-7-3 Error Code
[5103,5104,5105,5107,5115]]
Refer to the following page(s). [8-5-1 Comparing the High-
Pressure Sensor Measurement and Gauge Pressure]
Check the sensor temperature/pressure on the LED moni-
tor.
Check the sensor temperature/pressure on the LED moni-
tor.
Refer to item (6) in section [6-1 Read before Test Run].
+0,-0.15
MPa
13
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