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Maintenance of the humidifier
element (VNK type only)
The replacement cycle of the humidifier element varies
greatly depending on the conditions of use. Refer to the
cycles below as general replacement cycles. (They are
not the terms of guarantee.)
• The humidifying performance deteriorates gradually
as impurities in tap water are accumulated in the
humidifying element.
• In general, replace the humidifying element when the
humidifying performance of the element has
deteriorated by 20 to 40% compared with that of a
new one.
• Estimated operating hours: 10 hours per day X 20
days per month X 5 months per year = 1000 hours
per year
• The amount of impurities accumulated in the
humidifying element is largely dependent on the
water quality (water hardness, the variety or amount
of impurities, the pH of the water, water temperature,
etc.) or conditions of use.
When the water hardness is 25 mg/L
Every 5 years
When the water hardness is 50 mg/L
Every 3 years
When the water hardness is 100 mg/L
Every 2 years
17
Troubleshooting
Confirmation and check
When an error occurred in the Air to Air Heat
Exchanger with DX Coil Unit, the check code and the
indoor unit No. appear on the display part of the remote
controller.
The check code is only displayed during the operation.
If the display disappears, operate the Air to Air Heat
Exchanger with DX Coil Unit according to the following
“Confirmation of error log” for confirmation.
Confirmation of error log
When an error occurred on the Air to Air Heat
Exchanger with DX Coil Unit, the error log can be
confirmed with the following procedure. (The error log
is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
1
When
and
buttons are pushed
simultaneously for 4 seconds or more, the
following display appears.
If [Service check]
is displayed, the mode
enters in the error log mode.
• [
01
: Order of error log] is displayed in CODE No.
window.
• [Check code] is displayed in CHECK window.
• [Air to Air Heat Exchanger with DX Coil Unit
address in which an error occurred] is displayed
in Unit No.
2
Every pushing of
button used to set
temperature, the error log stored in memory
is displayed in order.
The numbers in CODE No. indicate CODE No.
[
01
] (latest)
→
[
04
] (oldest).
REQUIREMENT
Do not push
button because all the error log of the
Air to Air Heat Exchanger with DX Coil Unit will be
deleted.
3
After confirmation, push
button to return
to the usual display.
Check code
Unit No. of the Air to Air Heat Exchanger
with DX Coil Unit with a problem
3
2
1
157-EN
158-EN
+00EH99887601-2_01EN.book Page 79 Thursday, September 15, 2016 5:23 PM
