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Operating The Unit; Initial Operation; Daily Operation - Mitsubishi Electric CAHV-P500YA-HPB Instruction Manual

Air-cooled heat pump unit cahv series
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2. Operating the Unit

[1] Initial Operation

1. Make sure the ON/OFF switch that controls the unit on the on-site control panel is switched off.
2. Switch on the main power.
3. Leave the main power switched on for at least 12 hours before turning on the ON/OFF switch that
controls the unit on the on-site control panel to warm up the compressor.
4. Switch on the ON/OFF switch that controls the unit on the on-site control panel.

[2] Daily Operation

To start an operation
Switch on the ON/OFF switch that controls the unit on the on-site control panel.
Note
The unit described in this manual features a circuit that protects the compressor from short-cycling. Once the
compressor stops, it will not start up again for up to 10 minutes. If the unit does not start when the ON/OFF
switch is turned on, leave the switch turned on for 10 minutes. The unit will automatically start up within 10
minutes.
To stop an operation
Switch off the ON/OFF switch that controls the unit on the on-site control panel.
IMPORTANT
・ Keep the main power turned on throughout the operating season, in which the unit is stopped for three
days or shorter (e.g., during the night and on weekends).
・ Unless in areas where the outside temperature drops to freezing, switch off the main power when the unit
will not be operated for four days or longer. (Switch off the water circulating pump if the pump is
connected to a separate circuit.)
・ When resuming operation after the main power has been turned off for a full day or longer, follow the
steps under "Initial Operation" above.
・ If the main power was turned off for six days or longer, make sure that the clock on the unit is correct.
7/20

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