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(3) Special operation for maintenance and inspection (SW801, SW804)
SW801 and SW804 can perform the following special operations for maintenance and inspection.
1) Switches the dip switch SW804. (See the table below)
2) Presses the push-button switch SW801 for approx. 1 second.
3) Starts the functions shown below. During the start processing of each function, LED D805 (Green) blinks.
4) When the push-button switch SW801 is pressed for approx. 1 second, or the dip switch SW804 is switched,
or the defined time for each function has passed, the each function stops and LED D805 (Green) returns
to continuous lit.
<Special operation>
SW804 Operation when press button switch SW801 is pressed
Refrigerant recovery operation
The outdoor unit operates cooling. The hydro unit may freeze with this operation alone. Remove beforehand the
water in the hydro unit. (See 16-1)
Hydro unit cooling request
Performs a trial cooling operation. (See Note1)
Hydro unit heating request
Performs a trial heating operation.(See Note1)
Fan motor forcible operation
Forcibly performs a fan motor operation.
When SW801 is pressed again or after 2 minutes, the operation returns to the normal
control.
Caution:
Although these
controls are available
during an operation,
basically perform
them when no
operation is in
progress.
Performing these
controls during an
operation may cause
dangerously rapid
pressure change.
(No operation particularly)
PMV full open operation
Fully opens PMV (Pulse motor valve).
When SW801 is pressed again or after 2 minutes, the operation returns to the normal
control.
PMV full close operation
Fully closes PMV (Pulse motor valve).
When SW801 is pressed again or after 2 minutes, the operation returns to the normal
control.
PMV half open operation
Half opens (250 pulses) PMV (Pulse motor valve).
When SW801 is pressed again or after 2 minutes, the operation returns to the normal
control.
4-way valve relay operation (RY700, CN700 for check)
Sets 4-way valve energization relay (RY700) to ON.
When SW801 is pressed again or after 2 minutes, the operation returns to the normal
control.
Caution:
Do not connect the coil into the body when perform this operation.
1234
ON
SW804
1234
ON
SW804
1234
ON
SW804
1234
ON
SW804
1234
ON
SW804
1234
ON
SW804
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ON
SW804
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ON
SW804
1234
ON
SW804
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 125 Monday, October 5, 2009 2:09 PM