Mitsubishi Electric PURY-HP96T Instalační manuál stáhnout pdf (Strana 190)

[ IX Troubleshooting ]

- 181 -

HWE09120 GB

1. Error Code

Heatsink overheat protection

2. Error definition and error detection method

When the heat sink temperature (THHS) remains at or above TOH is detected.

3. Cause, check method and remedy

Refer to section -6- "Inverter (TJMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the

inverter.(page 251)

4230 (TJMU-A)

Model TOH

P72 model 100°C [212°F]

P96, P120, P144 models 90°C [194°F]

Cause Check method and remedy

(1) Fan board failure Refer to IX [4] -6- (2) [6].(page 255)

(2) Outdoor unit fan failure Check the outdoor unit fan operation.

If any problem is found with the fan operation, check the fan motor. ->Refer to

IX [4] -6- (2) [5].(page 255)

(3) Air passage blockage Check that the heat sink cooling air passage is not blocked

(4) THHS failure P72 model

1) Check for proper installation of the INV board IGBT. (Check for proper instal-

lation of the IGBT heatsink.)

2) Check for proper installation of the INV board IGBT.

->If an abnormal value appears, replace the INV board.

P96, P120, P144 models

3) Check the THHS sensor reading on the LED monitor.

->If an abnormal value appears, check the sensor resistance, and replace the

sensor as necessary.

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Mitsubishi Electric PURY-HP96T Instalační manuál Strana 190