Innotherm UCCA-48HDC, UCCA-60HDC, UCCA-36HDC Installation Instructions Manual

Error

Code

Error Code Indication TROUBLE SHOOTING

Ｅ01 Wire Controller EEPROM Error A. Check EEPROM chip on wire controller PCB is

loose,; B. After step A, if unit still displays error

code E01, change the wire controller.

Ｅ02 Indoor Unit PCB EEPROM Error A. Check EEPROM chip on indoor unit PCB is

loose, the chip location on12KBUT/18KBTU model

PCB is IC11, on 24KBTU/36KBTU model PCB is

IC7; B. After step A, if unit still displays error code

E02, change the indoor unit PCB.

Ｅ03

SIGNAL COMMUNICATION

BETWEEN OUTDOOR UNIT MAIN

PCB AND INVERTER MODULAR

BOARD

A. Check the wiring on outdoor unit main PCB is

correct or loose; B. If step A is passed, then change

outdoor unit main PCB; C. If step A does not pass,

change outdoor unit inverter modular board.

Ｅ05 OUTDOOR UNIT FAN COIL

TEMPERATURE SENSOR

FAILURE

A. Connection location on outdoor unit main PCB

is: CN15 PO\PG\PQ for 12kbtu/18kbtu/

24kbtu/36kbtu, PO is for outdoor ambient

temperature sensor, PG is for outdoor fan coil

temperature sensor, PQ is for outdoor unit discharge

gas temperature sensor. Replace with new sensor; B.

after step A, if unit still displays error code E05,

change the outdoor unit main PCB.

Ｅ06

OUTDOOR UNIT AMBIENT

TEMPERATURE SENSOR

FAILURE

A. Connection location on outdoor unit main

PCB is: CN15 PO\PG\PQ for 12kbtu/18kbtu/

24kbtu/36kbtu, PO is for outdoor ambient

temperature sensor, PG is for outdoor fan coil

temperature sensor, PQ is for outdoor unit

discharge gas temperature sensor. Replace with

new sensor; B. after step A, if unit still displays

error code E06, change the outdoor unit main

PCB.

Ｅ07

OUTDOOR UNIT DISCHARGE

GAS PIPE TEMPERATURE

SENSOR FAILURE

A. Connection location on outdoor unit main PCB

is: CN15 PO\ PG\PQ for 12kbtu/18kbtu/

24kbtu/36kbtu, PO is for outdoor ambient

temperature sensor, PG is for outdoor fan coil

temperature sensor, PQ is for outdoor unit discharge

gas temperature sensor. Replace with new sensor; B.

after step A, if unit still displays error code E07,

change the outdoor unit main PCB.

E08 SINGAL COMMUNICATION

BETWEEN INDOOR AND WIRE

CONTROLLER FAILURE

A. Check the wiring between indoor unit and

wire controller; B. If not work, change wire controller

OR wire between wire controller and indoor unit PCB;

C. if not work, change indoor unit PCB.

Ｅ09 SINGAL COMMUNICATION

BETWEEN INDOOR AND

OUTDOOR UNIT FAILURE

A. Check the wiring sequence between indoor unit

and outdoor unit, if wired incorrect this will cause

damage to the PCB for both indoor unit and outdoor

unit; B. Check the status of LED4 lamp on outdoor

unit main PCB, if it’s dark or flashing, check the

wiring on outdoor unit main PCB, if wiring is

correct, change the outdoor unit main PCB; C. if

LED4 lamp is lit, change indoor unit PCB; D. If step

C does not work, change outdoor unit main PCB.

Ｅ10 DISCHARGE GAS TEMPERATURE

OR COMPRESSOR

TEMPERATURE OVERHEAT

PROTECTION

Check that the refrigerant charge is correct, if

refrigerant charge is low test system for leaks.

Ｅ12 INVERTER MODULAR BOARD

FAILURE

A. Check the voltage of input AC power is correct;

B. Check the wiring on outdoor unit main PCB is

correct, or loose; C. If step A & B are passed but

unit is still not functional, change the inverter

modular board; D. if step C does not work, then

change the outdoor unit main PCB.

Ｅ13

OVER CURRENT OR LOW

CURRENT PROTECTION

A. Check the voltage of input AC power is within

normal range. B. Check DC power voltage on

outdoor unit main PCB, if the voltage is lower than

150VDC, then replace the outdoor unit main PCB;

if the volt age is higher than 400VDC, then change

PFC modular board, or change the inverter modular

board.

Ｅ14

INDOOR UNIT FAN COIL

TEMPERATURE SENSOR

FAILURE

A. Connection location on indoor unit PCB is:

CN8/T2_PIPE for 12kbtu/18kbtu, CN19/PIP E/PT

for 24kbtu/36kbtu, replace with new sensor; B. after

step A, if unit still displays error code E3, change

the indoor unit PCB.

Ｅ16

INDOOR UNIT AMBIENT

TEMPERATURE SENSOR

FAILURE

A. Connection location on indoor unit PCB is:

CN11/ T1_ROOM for 12kbtu/18kbtu,

CN20/ROOM/RT for 24kbtu/36kbtu, replace with

new sensor; B. after step A, if unit still displays

error code E2, change the indoor unit PCB.

Ｅ17

ANTI-FROSTING IN COOLING

MODE

A. Check if indoor unit fan motor is operating;

B. Check if unit is in the cooling mode when ambient

temperature is too low; C. Check if the resistance

data of indoor unit fan coil temperature sensor is

correct according to resistance data table of sensors

in this manual.

Ｅ18 ANTI-OVERHEATING IN

HEATING MODE

A. Check if indoor unit fan motor is operating;

B. Check if unit is in the heating mode when

ambient temperature is too hot; C. Check if the

resistance data of indoor unit fan coil temperature

sensor is correct according to resistance data table

of sensors in this manual.

E21 OUTDOOR CONDENSER

OVERHEAT IN COOLING MODE

A. Check if outdoor unit fan motor is operating;

B. Check if unit is in the cooling mode when ambient

temperature is too hot; C. Check if the resistance

data of outdoor unit fan coil temperature sensor is

correct according to resistance data table of sensors

in this manual.