Gree EH01100030, Service Manual

23

Energy-Recovery Ventilation 

System Service Manual

MAINTENANCE

1 TROUBLE TABLE 

Error

Error code

Logic

Communication error

E6

Communication between the main board and the wire remote 

controller is in trouble.

Indoor temp sensor error

F0

Something is wrong with temp sensor or the temperature is 

overstep the range of the temp sensor.

Humidity sensor error

L1

Humidity sensor is not connected or communication is in trouble.

Outdoor temp sensor error

F3

Something is wrong with temp sensor or the temperature is 

overstep the range of the temp sensor.

Air valve and relevant fitting error 

or wrong connection of centralized 

control wiring of air valve

L0

By-pass door and drive structure of the unit loose.

After debugging and trial run, the unit can be normally used by the user. If any fault occurs, remove it firstly by yourself 

according to the following table before you contact us.

No.

Phenomenon 

Possible causes 

Solutions

1

Airflow volume at air 

outlet/inlet is obviously 

decreased after a 

period of time.

Too much dust gathers on 

the air filter.

Re-fix the collecting place of air vent.

2

Noise occurs at air vent.

Installation of air 

vent is loose. 

Re-fix the collecting place of air vent.

3

The system can 

not be started.

No power supply 

or power cord is 

incorrectly connected.

Terminals of main board 

transformer are loose.

Communication fault (E6).

Air valve and 

relative fittings 

are faulted (L0).

The centralized controller 

of air valve of main board 

is not connected (L0).

Repair the power supply and check power 

cord according.

Repair the power supply and check power 

cord according to circuit diagram on the unit. 

Re-insert and connect transformer terminals. 

Check the connecting wire between 

displayer and main board. 

Check by-pass door and drive 

structure of the unit and fix it. 

Connect CONTROPL port of main board; 

with live line or pinboard of air dampers.

4

There is not air from 

indoor or outdoor vent 

after opening the switch.

1. No power supply 

or power cord is 

incorrectly connected.

2. Control wire is not or 

incorrectly connected.

1. Check power and power supply

2. Check the connecting line between 

operational box and main unit.