Mitsubishi Electric PUZ-A12NKA7 Service Manual page 6

2-5. LOW AMBIENT COOLING
Precautions for low ambient cooling
• If the outdoor temperature is 23°F or lower during cooling operation, install an optional air guide to prevent wind from
blowing into the outdoor unit.
• Install the outdoor unit in a location where wind will not blow onto the back of the unit.
• To prevent damage to the parts, be sure to install the unit, turn on the main power, and perform service in an environment
where the ambient temperature is 0°F or higher.
• In order to protect the compressor and electrical components, do not turn off the circuit breaker if the unit is installed in an
environment where the ambient temperature is 0°F or lower.
• It needs at least 12 hr standby to operation in order to warm the electrical parts.
Note: During cooling operation under low ambient temperature, the bottom fan motor of A36, 42N stops occasionally. This is
an intended feature, not a malfunction.
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