Troubleshooting - Carrier MMU-AP0072H2UL Installation Manual

Wireless remote control
1
Procedure
Turn on the power of the air conditioner.
When power is turned on for the first time after
installation, it takes approx. 5 minutes until the remote
control becomes available. In the case of subsequent
power-on, it takes approx. 1 minute until the remote
control becomes available. Execute a test run after the
predetermined time has passed.
2
Procedure
Push "ON/OFF" button on the remote control, select
[COOL] or [HEAT] with "MODE" button, and then select
[HIGH] with "FAN" button.
3
Procedure
Cooling test run Heating test run
Set the temperature to 64 °F Set the temperature to 86 °F
(18 °C) with the temp. setup (30 °C) with the temp. setup
buttons. buttons.
4
Procedure
Cooling test run Heating test run
After confirming a signal After confirming a signal
receiving sound "beep" receiving sound "beep"
immediately set the immediately set the
temperature to 66 °F (19 °C) temperature to 84 °F (29 °C)
with the temp. setup buttons. with the temp. setup buttons.
5
Procedure
Cooling test run Heating test run
After confirming a signal After confirming a signal
receiving sound "beep" receiving sound "beep"
immediately set the immediately set the
temperature to 64 °F (18 °C) temperature to 86 °F (30 °C)
with the temp. setup buttons. with the temp. setup buttons.
6
Procedure
4 5 4 5
Repeat procedures → → → .
Indicators "Operation" (green), "Timer" (green), and
"Ready" (orange) in the wireless receiver section flash
in approx. 10 seconds, and the air conditioner starts
operation. If any of these indicators does not flash,
2 5
repeat procedures to .
7
Procedure
Upon completion of the test run, push "ON/OFF" button
to stop operation.
29-EN
<Overview of test run operations using the
wireless remote control>
▼ Cooling test run:
ON/OFF → 64 °F (18 °C) → 66 °F (19 °C) → 64 °F (18
°C) → 66 °F (19 °C) → 64 °F (18 °C) → 66 °F (19 °C)
→ 64 °F (18 °C) → (test run) → ON/OFF
▼ Heating test run:
ON/OFF → 86 °F (30 °C) → 84 °F (29 °C) → 86 °F (30
°C) → 84 °F (29 °C) → 86 °F (30 °C) → 84 °F (29 °C)
→ 86 °F (30 °C) → (test run) → ON/OFF
Always select
[HIGH] fan
speed.
3, 4,
2
5, 6
2
2,7
– 15 –
10

Troubleshooting

 Confirmation and check
When an error occurred in the air conditioner, the
check code and the indoor UNIT No. appear on the
display part of the remote control.
The check code is only displayed during the operation.
If the display disappears, operate the air conditioner
according to the following "Confirmation of error log" for
confirmation.
Check code Indoor UNIT No. in
which an error occurred
 Confirmation of error log
When an error occurred on the air conditioner, the error
log can be confirmed with the following procedure.
(The error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
2
3
1
Procedure
Push and buttons simultaneously for 4 seconds
or more, the following display appears.
If [Service check] is displayed, the mode enters in
the error log mode.
• [01: Order of error log] is displayed in CODE No.
window.
• [Check code] is displayed in CHECK window.
• [Indoor unit address in which an error occurred] is
displayed in Unit No.
2
Procedure
Push button. The error log stored in memory is
displayed in order.
The numbers in CODE No. indicate CODE No. [01]
(latest) → [04] (oldest).
REQUIREMENT
Do not push button because all the error log of the
indoor unit will be deleted.
3
Procedure
Push button to return to the usual display after
confirmation.
1. Check the errors according to the above procedure.
2. Ask an authorized dealer or qualified service
(maintenance) professional to repair or maintain the
air conditioner.
1
30-EN