Low building supply voltage
(if new cabinet, check this
first)
• Open the top access cover and locate electrical panel
inside.
• Refer to Fig. 3.1 (PCR) or Fig. 3.2 (SCR) below to locate
the motor voltage sampling port.
• Using voltmeter, measure AC voltage at the motor
voltage sampling port as described in the re-certification
section of this manual. This is to measure the motor
voltage.
• For new cabinets, if the motor voltage is lower than the
Nominal Voltage value recorded in the factory test
report, adjust the speed control to get output voltage to
blower as specified in the Test Report – Test Conditions
Documentation Sheet.
• For a cabinet that has been used for more than 1 year,
refer to last motor Nominal Voltage from last
certification report or if not available, measure the
actual airflow on cabinet and increase motor voltage
accordingly to achieve nominal airflow velocity.
• If motor voltage is same as last Nominal Voltage, proceed
to next step.
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