Controller; External View; Keys & Indicating Leds - Gree GRS-CQ8.0Pd/NaEK Service Manual

three times within 60 minutes that the unit comes into water pump overload protection, this error will be
displayed and is unrecoverable. The unit is allowed to restart only after the unit is shut down manually
and this error is cleared.
(5) Compressor Hi-pressure Protection
In any case, when it is detected that the high-pressure switch acts, the unit will come into
high-pressure protection three seconds later. This protection is unrecoverable.
(6) Flow Switch Protection
In any case, when it is detected that the flow switch of the main unit disconnects, then all loads
except the water pump of the solar system and the auxiliary electric heater of the water tank will stop.
This protection is unrecoverable. The unit is allowed to be restart only after this error is cleared and the
unit is repowered on.
(7) Communication Error
When the indoor unit main board or drive board does not receive correctly any data from the unit
main board, all loads will stop and vice versa.

3 Controller

3.1 External View

3.1.1 Keys & Indicating LEDs
No. Symbol
Running indicating LED
①
Unit Control
(This effect drawing is just for reference)
Name
It will light on/off when the unit is turned on/off.
(green)
Functional Description
45