Mitsubishi Electric GUG-01SL-E Handbook page 21

LED11
Symptom
(green)
2 blinks Drain water
overflow
3 blinks Disconnection
of the water
sensor con-
nector
4 blinks Test run of the
drain pump
5 blinks Errors detect-
ed on PCB A
of the Dx-coil
unit
6 blinks Communication
error between
PCB A and
PCB B
Cause
Follow the flowchart when "2600" is displayed on Lossnay remote controller (PZ-
61DR-E) or M-NET system controllers.
LED11: 2 blinks
Error code: "2600"
Is the water sensor of the
drain pan submerged?
YES
Does the drain
pump fail to operate?
YES
See the symptom
"Drain pump fails to operate."
(Page 31)
Faulty connection of connector CN10
on PCB B of the Dx-coil unit
Test run switch (SW11-1) on PCB B
is set to ON.
Some error has occurred on PCB A
of the Dx-coil unit.
Faulty connection of connector
CN105 on PCB A of the Dx-coil unit
Faulty connection of connector CN5
on PCB B of the Dx-coil unit
Communication error between PCB A
of the Dx-coil unit and outdoor unit at
system startup
Failure of PCB A of the Dx-coil unit.
─ 21 ─
NO
After stopping the Dx-coil
unit, operate it again.
YES
Is the water sensor of the
drain pan submerged?
NO
LED11: 2 blinks
Error code: "2600"
See the symptom
"Drainage water quantity
of the drain pump is less."
(Page 31)
Check the connector connection of CN10
on PCB B.
Check the test run switch (SW11-1) on
PCB B of the Dx-coil unit.
See (1).
Check the connector connection of CN105
on PCB A.
Check the connector connection of CN5 on
PCB B.
Check the error display on Dx-coil unit
remote controller (PZ-01RC).
See (1).
• Check the display on Dx-coil unit remote
controller (PZ-01RC).
• If the problem cannot be solved after
checking the above items, replace PCB A
(IF013) or PCB B (GU-01-E) of the Dx-
coil unit.
Corrective action
NO
NO
Does LED11 on PCB B
blinks 10 times?
YES
YES
See the symptom
Replace the
"Drain pump
water sensor
maintenance sign"
or PCB B.
(Page 23)
NO
No action
is required.