Errors; Error Code Table; Impact On Other Units - Midea MDV-D22Q1/N1-D Technical Manual

2 Errors

2.1 Error Code Table

Table 4.1: Error code table
Error
Content
code
E0 Mode conflict
E1 Communication error between indoor and outdoor units
E2 Indoor ambient temperature sensor error
Indoor heat exchanger mid-point temperature sensor
E3
error
E4 Indoor heat exchanger outlet temperature sensor error
E6 Fan error
E7 EEPROM mismatch
Ed Outdoor unit error
EE Water level error
FE Indoor unit has not been assigned an address
n/a Louver swing failure
Notes:
1. Flashing rapidly means flashing twice per second; flashing slowly means flashing once per second.
2. In the event of a louver swing failure, no error code is displayed. For troubleshooting guidance for louver swing failure, refer to
Failure Troubleshooting".

2.2 Impact on Other Units

Table 4.2 shows the impact of an error on one indoor unit on the outdoor units and on the other indoor units in
the system. The actual state of the outdoor units and the other indoor units is determined not only by the impacts
shown in Table 4.2, but also by any other errors that may have separately arisen on the outdoor units or other
indoor units.
Table 4.2: Impact of indoor unit error on outdoor units and on other indoor units
Indoor unit error
Notes:
1.
2.
3.
4.
5.
2
Impact on outdoor units
E0 Minimal impact
E1
E2 Minimal impact
E3 Minimal impact
E4 Minimal impact
E6 Minimal impact
E7 Minimal impact
Ed
EE Minimal impact
FE
The outdoor units continue to operate and ignore the load requirement from the indoor unit that
has gone into mode conflict with the outdoor units.
Outdoor unit error code H7 indicates that the number of indoor units detected by the master
outdoor unit is not the same as the number set on the master outdoor unit's main PCB.
Error Ed may not be displayed on the other indoor units. Indoor unit error codes have the following
order of priority: FE-E1-E2-E3-E4-E6-E7-Ed-EE-E0. So if, for example, one unit has an E2 error, it
continues to display E2 even if an E1 or FE error occurs on another indoor unit (giving rise to an
outdoor unit H7 error) since error Ed is lower in the order of priority than error E2.
The outdoor units continue to operate but detect no load requirement from the indoor unit that
has experienced an E2, E3, E4, E6, E7 or EE error, and adjust their output accordingly, in the same
way as they do when a user puts an indoor unit into standby.
An indoor unit Ed error is caused by (and not the cause of) an outdoor unit error. The outdoor units
will be displaying their own error code.
Four LED display
DEF./FAN LED flashes rapidly
TIMER LED flashes rapidly
OPERATION LED flashes rapidly
OPERATION LED flashes rapidly
OPERATION LED flashes rapidly
TIMER LED flashes slowly
DEF./FAN LED flashes slowly
ALARM LED flashes slowly
ALARM LED flashes rapidly
OPERATION and TIMER LEDs flash
Impact on other indoor units
1
H7 error 2
4
4
4
4
4
5
n/a
4
H7 error 2
32
Display output
1
n/a
No impact
Ed error 3
No impact
No impact
No impact
No impact
No impact
5
n/a
No impact
Ed error 3
Digital display
E0
E1
E2
E3
E4
E6
E7
Ed
EE
FE
n/a
5.10 "Louver Swing