In Abnormal Condition; Emergency Operation - Hitachi PC-ALHZF Installations- Und Betriebshandbuch

Operation

5.4.2 In Abnormal Condition

Abnormality
• When some troubles occur such as safety device actuation,
etc. during the test run or the normal operation, "RUN" (red
lamp) flashes (0.5 second ON / 0.5 second OFF).
• The alarm codes are indicated by the flashing times of "DEF"
(green lamp) and "FILTER" (yellow lamp).
"DEF" (green): The number of flashing is shown at the tens digit
of alarm code.
"FILTER" (yellow): The number of flashing is shown at the units
digit of alarm code.
Example
3 5
Alarm
"DEF" flashes 3 times
(0.5 second ON/0.5 second OFF)
"FILTER" flashes 5 times
(0.5 second ON/0.5 second OFF)
These indications are repeated until the alarm is reset.

5.5 EMERGENCY OPERATION

N O T E
• The setting temperature and the fan speed for cooling/heating
operation are the same as before starting emergency opera-
tion.
• During the emergency operation, "
(0.5 second ON / 0.5 second OFF).
Function
"COOL" and "HEAT" switches are used for emergency operation
when the batteries for wireless remote control switch are shor-
tage.
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"FILTER" (yellow lamp)
"DEF" (green lamp)
" lamp (yellow) flashes
9 PMML0264A rev.1 - 09/2015 - P5416575
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Power failure
• All the indications are OFF.
• Once the unit is stopped by the power failure, the unit will not
be started again although the power recovers. Perform the
starting procedures again.
• In case of instantaneous power failure within 2 seconds, the
unit will be started again automatically.
Electric noise
There could be a case that all the indications are OFF and the
unit is stopped. This is occurred by the activation of the micro
computer for the unit protection from the electric noise.
Perform the starting procedures again.
EMERGENCY
RUN
COOL
DEF
HEAT
FILTER
TIMER
Switch "COOL": Press "COOL" so that the cooling operation is
started. Press "COOL" again so that the cooling operation is
stopped.
Switch "HEAT": Press "HEAT" so that the heating operation is
started. Press "HEAT" again so that the heating operation is
stopped.
Switch "COOL"
Switch "HEAT"