Test Run; Troubleshooting - Toshiba Carrier MMD-AP0726HP-UL Manual De Instalación

10

Test run

Before test run
Before turning on the power supply, carry out the
following procedure.
1) By using 500 V-megger, check that resistance of
1 M or more exists between the terminal block L
to N and the earth (grounding).
If resistance of less than 1 M is detected, do not
run the unit.
2) Check the valve of the outdoor unit being opened
fully.
To protect the compressor at activation time, leave
power-ON for 12 hours or more before operating.
Do not press the electromagnetic contactor to
forcibly perform a test run. (This is very dangerous
because the protective device does not work.)
Before starting a test run, set addresses by following
the Installation Manual supplied with the outdoor
unit.
Execute a test run
When a fan operation is to be performed for an
individual indoor unit, turn off the power, short CN72
on the circuit board, and then turn the power back
on. (First set the operating mode to "fan," and then
operate.) When the test run has been performed
using this method, do NOT forget to release the
shorting of CN72 after the test run is completed.
Operate the unit with the wired remote control as
usual.
For the procedure of the operation, refer to the
attached Owner's Manual to the outdoor unit.
A forced test run can be executed in the following
procedure even if the operation stops by thermostat-
OFF.
In order to prevent a serial operation, the forced test
run is released after 60 minutes have passed and
returns to the usual operation.
CAUTION
Do not use the forced test run for cases other than
the test run because it applies an excessive load to
the devices.
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Wired remote control
2, 4
3
1,5
1
Push button for 4 seconds or more.
[TEST] is displayed on the display part and
the selection of mode in the test mode is
permitted.
2
Push button.
3
Select the operation mode with
button, [ Cool] or [ Heat].
Do not run the air conditioner in a mode other
than [ Cool] or [ Heat].
The temperature controlling function does not
work during test run.
The detection of trouble is performed as usual.
4
After the test run, push button to
stop a test run.
1
(Display part is same as procedure .)
5
Push button to cancel (release from) the
test run mode.
([TEST] disappears on the display and the status
returns to a normal.)
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11

Troubleshooting

Con rmation and check
When a problem occurred in the air conditioner, check
code and 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 "Con rmation of trouble log"
for con rmation.
Check code
Indoor UNIT No. in which
a problem occurred
Con rmation of trouble log
When a problem occurred on the air conditioner,
the trouble log can be con rmed with the following
procedure.
(The trouble log is stored in memory up to 4 troubles.)
The log can be con rmed from both operating status
and stop status.
2
3
1
1
When and buttons are pushed
simultaneously for 4 seconds or more, the
following display appears.
If is displayed, the mode enters in the trouble
log mode.
[01: Order of trouble log] is displayed in CODE
No..
[Check code] is displayed in CHECK.
[Indoor unit address in which a problem
occurred] is displayed in Unit No..
2
Every pushing of button used to set
temperature, the trouble 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 trouble log of
the indoor unit will be deleted.
3
After con rmation, push button to return
to the usual display.
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