Troubleshooting - Toshiba MMD-VNK502HEXE Installation Manual

53-EN
Air to Air Heat Exchanger with DX Coil Unit
Maintenance of the humidifier
element
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.)
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
• 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.
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Installation Manual
Air to Air Heat Exchanger with DX Coil Unit
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.
Check code
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.
2
3
1
When
simultaneously for 4 seconds or more, the
following display appears.
If [Service check]
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
Unit No. of the Air to Air Heat Exchanger
Every pushing of
with DX Coil Unit with a problem
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
Air to Air Heat Exchanger with DX Coil Unit will be
deleted.
3
After confirmation, push
to the usual display.
1
54-EN
Installation Manual
and buttons are pushed
is displayed, the mode
button used to set
button because all the error log of the
button to return