Error Code
E4 / E5
–
Sensor Problem
Indoor Unit or Wired Control Display
E4 / E5
Dr. Smart Display (Debugger)
E60 / E61
Malfunction decision conditions
If the sampling voltage is lower than 0.06V or higher
than 4.94V, the LED displays the failure.
Supposed Causes
• Wiring mistake
• Sensor faulty
• PCB faulty
Troubleshooting:
Error may only display every 3 minutes, during this time you may
see either “normal display” or “88” on indoor unit or wired control.
If after parts
replacement, error is
still displayed, contact
your local CE Technical
Support Rep.
Check the connection between
the temperature sensor and the PCB.
No
Measure the sensor’s resistance value.
Charts on next 3 pages.
Yes
Is it properly wired?
Is it a close
match to the
chart?
No
Reseat/Reconnect
Sensor connections
and retest system
Yes
Replace PCB Sensor
is connected to
Error to Sensor Location
E4 (E60)
–
T1 Return Sensor IDU
E5 (E61)
–
T2 Outlet Evap. Sensor IDU
Replace sensor
MAQ High Wall, MBD/MBQ Ducted, MBF Floor, MBC Cassette
Sensor Error E4 / E5 (page 1 of 3)
Follow the “1st Steps for DLS Troubleshooting”
in the beginning of this guide, if you have an
active error, procedure below.
Continued on next page
