Error Code
F1 / F2 / F3
–
Sensor Problem
Indoor Unit or Wired Control Display
F1 / F2 / F3
Dr. Smart Display (Debugger)
E5 & E53 / E5 & E52 / E5 & E54
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
Sensor Error F1 / F2 / F3 (page 1 of 4)
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
F1 (E53)
–
T4 Outdoor Ambient Temp
F2 (E52)
–
T3 Condenser Temp ODU
F3 (E54)
–
TP (T5) Comp. Discharge Temp
Replace sensor
38MAQB18~48K, 38MAQB09~36R
—
3, 38MARBQ09~36AA3 Outdoor Units
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
