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[ III Heat source Unit Components ]
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HWE09080 GB
(2) PQHY-P72, 96, 120YHMU-A, PQRY-P72, 96, 120YHMU-A
1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the waterproof
and dust proof properties of the control box and may result in damage to its internal components.
2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter-
minals to remove them.
<HIGH VOLTAGE WARNING>
Control box houses high-voltage parts.
When opening or closing the front panel of the control box, do not let it come into contact with any of
the internal components.
Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes,
and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.
(It takes about 10 minutes to discharge electricity after the power supply is turned off.)
Control boardRelay board
M-NET board
Terminal block for
transmission line
(TB3, TB7)
INV board
Pump interlock terminal block
(TB8)
Note1
Fuse
(F4)
Fuse
(F5)
Ground
terminal
Power supply terminal block
L1,L2,L3
(TB1)
Noise filter
DC reactor
(DCL)
Electromagnetic relay
(72C)
Capacitor
(C100)
Inrush current resistor
(R1,R5) Note2