Service Flowchart - Mitsubishi Electric GUG-01SL-E Handbook

7-1 Service flowchart

After checking the check items below, follow the troubleshooting for servicing.
See the Lossnay service handbook for individual failures of the Lossnay units, and the outdoor unit service
handbook for failures of the outdoor units.
Applicable Device
Dx-coil unit
Connectable
Lossnay unit
No. Preliminary check item
1 Product information
2 Fault status
3 Frequency of fault occur-
rence
4 Timing of fault occurrence • Remote controller operation performed before fault occurrence
5 System settings
6 System drawings
The system fails to start up.
• An error code is displayed on the remote
controller.
• LEDs on the circuit boards blink.
The system fails to operate properly.
GUG-01SL-E GUG-02SL-E
LGH-50RVX-E LGH-80RVX-E
LGH-65RVX-E LGH-100RVX-E
• Model name of the product
• Serial number of the product, manufacturing lot number of the circuit board
• Microcomputer software version marked on the circuit board
• Fault status (For example, the Dx-coil unit does not perform temperature
control.)
• Error code display on the remote controller
• Function setting of the remote controller (operation mode setting, fan speed
setting, etc.)
• Frequency of fault occurrence (frequency of date and time of occurrence,
regularity of occurrence, etc.)
• Operating time up to fault occurrence
• Date of start of use, date of fault occurrence
• Operating status, etc.
• Function selection switch settings of the product
• Model name and address setting of the remote controllers (PZ-01RC, PZ-
61DR-E, or system controllers).
• Function settings on PZ-61DR-E when PZ-61DR-E is used
• System Configuration
• Wiring
• Record of the function setting statuses
Applicable Model
GUG-03SL-E
LGH-150RVX-E, LGH-200RVX-E
LGH-150RVXT-E, LGH-200RVXT-E
LGH-250RVXT-E
Details
7-2 Initial check items
7-3 Error code and LED display
7-4 The system fails to operate properly.
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Remote controller
PZ-01RC
PZ-61DR-E