Airgroup COOLBREEZE D095, Техническое и сервисное руководство

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FAULT
Ref
1.1 Display illumination level set too low.
1.2 240v mains supply isolated.
1.3 Keypad not connected.
Check 7-pin cable connection and continuity.
1.4 ECRU failure.
If 17 vdc not present between pins 1 and 7 replace ECRU.
1.5 ECRU failure. Verify control signal from keypad with indicator LED’s on ECRU.
Check using substitute keypad.
2.1 Keypad failure.
3.2
FAULT
Ref
3.1 Keypad failure, no signal to ECRU. If fan LED not lit on ECRU check for faulty keypad cable.
3.2 Motor not powered Check multi pin jack plug between the motor and the ECRU.
3.3 Motor not powered
3.4 Motor seized. Replace motor.
3.5 Fan jammed in cowling. Centralise fan in cowling.
3.6 ECRU failure. Confirm 5 vdc between terminal 1 & 2 .
4.1 Any of the above FAN faults. Check 3.1 to 3.6 above.
4.2 Keypad has no signal to roof unit.
4.3 ECRU failure
5. FAN CUTS OFF 5.1 Loss of power to air conditioner.
Check display on keypad, if keypad illuminated check for possible
thermal overload. Refer to 3.2
Select “FAN” confirm 1.2/2.6vdc present between ter- minals 2 &
3 depending on fan speed selected. If no voltage present replace
ECRU.
If EXH & FAN LED’s are lit confirm voltage between ter- minals 1 &
2 is 5vdc, voltage between terminals 2 & 3 is 1.1/1.7vdc
depending on fan speed selected, and the voltage between
terminals 2 & 4 is 5vdc. If these volt- ages are present replace the
motor, if these voltages are not present replace the ECRU.
If EXH & FAN LED’s are not lit on ECRU check for faulty keypad
cable or controller.
Select ‘FAN’ at
keypad and fault
find as follows
4. FAN WILL NOT
OPERATE IN EX-
HAUST
CAUSE ACTION
With the unit in standby function, confirm 240vac present at
motor power cable. If no voltage present replace ECRU.
3. FAN NOT
OPERATING
3. KEYPAD SHOWS
UNIT IS OPERATING
BUT THERE IS NO
AIRFLOW
Whilst in ‘OFF’ mode adjust illumination with speed > (increase)
button. 1. NO DISPLAY AT
KEYPAD
2. NO RESPONSE
FROM KEYPAD Select desired function and confirm the appropriate LED is
illuminated. If no LED’s suspect faulty keypad or control cable
ELECTRICAL FAULTS
CAUSE ACTION
FAULT FINDING - MAXIMA INVERTER MOTOR
Check to see if there is any obvious causes. Reset the unit by
turning off the mains supply then re-start unit. If the motor stops
again within 10 seconds - Thermal overload switch has activated -
replace motor The Current Limit protection on the
motor has been activated
Check mains fuse, circuit breaker, unit isolation switch and red
LED on ECRU.
FAN FAULTS
ATTENTION: Be advised that the Maxima Inverter Motor has a delay time period
before starting and incorporates a ramp up / ramp down operation
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