Hitachi CIW03-H User Manual

10. FrostWash
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A16381TMF2
10. FrostWash
FrostWash is available when applicable outdoor units and indoor units are connected. To use this function in VRF
system, outdoor unit function selection item "F1" need to be congured on outdoor units.
Please refer to the dedicated Service Manual for the FrostWash function.
Please congure function selection F1 on the outdoor units, and then set the wired remote controller.*
1
Please also refer to the Operation Manual and Service Manual of Wired Remote Controller for details.
Please contact the distributor or service personnel for availability and conguration of this function.
1. About FrostWash
•
Regarding the noise upon freezing and defrosting
Cracking noise may be heard during the freezing or defrosting phase due to temperature change. Refrigerant
ow noise may also be heard. The noise may be heard relatively louder in a quiet environment. It is
recommended to set the "Auto-FrostWash Schedule" when the room is not occupied.
Choose not to use the FrostWash function in places such as hotel rooms and hospitals, where consistent
quietness is expected.
•
Ice fog may come out from air outlet during the FrostWash operation.
Ice fog could happen in a humid environment such as the room humidier is used in a small room.
•
FrostWash is available when the outside temperature is in the range of 34
o
F - 110
o
F (1
o
C - 43
o
C), and the
indoor temperature is in the range of 59
o
F - 86
o
F (15
o
C - 30
o
C).
Also refer to technical documents of outdoor units because outdoor temperature range may vary depending
on outdoor units' type.
•
The temperature around the indoor unit may drop slightly during FrostWash operation.
2. Start FrostWash
Generate frost on the coil and then melt the frost to wash the coil.
FrostWash setting is not enabled on the factory default setting.*
1
Refer to "FrostWash" in the Operation Manual
to enable this function.
Preparation
(Fan mode)
Start FrostWash
Freezing, defrosting, drying
heat exchanger
FrostWash Completed
Stop Automatically
Approx. 3 min.* Approx. 10 min. to 35 min.*
•
Press "OK" on the wired controller to cancel FrostWash in the middle of an operation.
•
Aer a cancellation, frost on the heat exchanger needs to be defrosted and the heat exchanger needs to be
dried. The system cannot start operation for at least 8 minutes aer cancelation.
•
You cannot start another FrostWash immediately aer a FrostWash operation completes. Run either cooling
operation, heating operation or dry operation for approx. 60 minutes. Then, start another FrostWash
operation.
NOTE:
•
Do not open or remove the air inlet grill during the FrostWash operation. It may cause injury or damage of
units.

Hitachi CIW03-H Specifications

General

Brand	Hitachi
Model	CIW03-H
Category	Remote Control
Language	English