Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 46

■ Error log and reset
Error indicator
Remote control display
Red LED on indoor unit control PCB
Red LED on outdoor unit control PCB • Memorizes a mode of higher priority.
■ Resetting the error log
1) RC-EX3A
• Resetting the memorized error log in the remote control
You touch the buttons in the order of "Menu" → "Service setting" → "Service & Maintenance" → "Service
password" → "Error display" → "Error history" on the TOP screen of remote control.And if you touch "Delete"
→ "Yes" button,all error log and anomaly data memorized in the remote control are deleted.
• Resetting the memorized error log in the indoor unit
You touch the buttons in the order of "Menu" → "Service setting" → "Service & Maintenance" → "Service
password" → "Error display" → "Error anomaly data" on the TOP screen of remote control.
The remote control transmits error log erase command to the indoor unit when "Yes" button is pressed on the erase
anomaly data screen.
Receiving the command, the indoor unit erase the log and answer the status of no error.
2) RC-E5
• Resetting the memorized error log in the remote control
Holding down "CHECK" button, press "TIMER" button to reset the error log memorized in the remote control.
• Resetting the memorized error log in the indoor unit
The remote control transmits error log erase command to the indoor unit when "VENTI" button is pressed while
holding down "CHECK" button.
Receiving the command, the indoor unit erase the log and answer the status of no error.
(2) Troubleshooting procedure
When any trouble has occurred, inspect as follows. Details of respective inspection method will be described on later pages.
Confirmation
of power
Trouble source
(Indoor/
outdoor unit)
(3) Troubleshooting at the indoor unit
(a) FDT, FDTC, FDU, FDUM, FDE series
With the troubleshooting, find out any defective part by checking the voltage (AC, DC), resistance, etc. at respective
connectors at around the indoor unit PCB, according to the inspection display or operation status of unit (the
compressor does not run, fan does not run, the 4-way valve does not switch, etc.), and replace or repair in the unit of
following part.
(i) Replacement part related to indoor unit PCB's
Control PCB, power source PCB, temperature sensor (return air, indoor heat exchanger), remote control switch, limit
switch, transformer and fuse
Note (1) With regard to parts of high voltage circuits and refrigeration cycle, judge it according to ordinary inspection methods.
Memorized error log
• Higher priority error is memorized.
• Not memorized.
Confirmation of
remote control and
LEDs on the PCB Check of the anomalous
of indoor unit and
outdoor unit (Indoor/
outdoor unit, remote
control)
45
-
• Stop the unit by pressing the ON/OFF
switch of remote control.
• If the unit has recovered from anomaly, it
can be operated.
operation data on the
remote control
-
'21 • PAC-SM-383
Reset
Replacement/
Inspection repair of
of the unit/ faulty part,
control test run,
adjustment