Unical ENERPUMP DHW 110, Installation And Service Manual

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Luxury Air Source Heat Pump-Monobloc System 44
E5 Outdoor ambient temp
sensor failure
* The unit stops running. 1) Outdoor ambient temp sensor
open circuit
2) Outdoor ambient temp sensor
short circuit
3) Main PCB damaged 1) Check the sensor connection
2) Replace the sensor
3) Replace the main PCB
E6 TH temp sensor failure
* The unit stops running. 1) TH temp sensor open circuit
2) TH temp sensor short circuit
3) Main PCB damaged 1) Check the sensor connection
2) Replace the sensor
3) Replace the main PCB
E7 TL temp sensor failure
* The unit stops running. 1) TL temp sensor open circuit
2) TL temp sensor short circuit
3) Main PCB damaged
1) Check the sensor connection
2) Replace the sensor
3) Replace the main PCB
E8 Indoor ambient temp
sensor failure
* The unit keeps running,
but display the error
code. 1) Indoor ambient temp sensor
open circuit
2) Indoor ambient temp sensor
short circuit
3) Main PCB damaged 1) Check the sensor connection
2) Replace the sensor
3) Replace the main PCB
E9 T2 temp sensor failure
* The unit stops running. 1) T2 temp sensor open circuit
2) T2 temp sensor short circuit
3) Main PCB damaged 1) Check the sensor connection
2) Replace the sensor
3) Replace the main PCB
Ea Communication failure
between indoor and
controller
* The unit stops running.
1) Communication failure
between indoor and controller
2) Controller damaged
3) Main PCB damaged 1) Check the connection wiring
(4 cores wiring)/ports between
controller and indoor PCB, and
check if the controller back side
wirings are connected correctly.
Replace the wiring or reconnect
the ports
2) Replace the controller
3) Replace the main PCB
Eb Communication failure
between indoor and
outdoor
* The unit stops running.
1) Communication failure
between indoor and outdoor
2) Main PCB damaged
3) Outdoor PCB damaged 1) Check the connection wiring
(2 cores wiring)/ports between
outdoor PCB and main PCB,
and check if they are connected
correctly. Replace the wiring or
reconnect the ports
2) Replace the controller
3) Replace the main PCB
Ec Indoor EEPROM failure
* The unit stops running. 1) Indoor EEPROM chip damaged
2) Data of indoor EEPROM error 1) Replace the EEPROM chip
2) Check If the chip installed
correctly, or replay the chip
Ed Controller clock IC failure
* The error code
disappeared 10 seconds
later, clock function and 1) Chip of controller clock IC
damaged
1) Replace the chip or replace
the controller