Daikin VAM-GVJU Specifications download pdf (Page 48)

EDUS711116 Operation Manual

VAM-GVJU 47

3P034927-7M

English 9

4-3 HOW TO CLEAN THE HEAT EXCHANGER

CORE

CLEANING FREQUENCY

AT LEAST ONCE EVERY TWO YEARS

(FOR GENERAL OFFICE USE)

(CLEAN THE CORE MORE FREQUENTLY IF NECESSARY.)

WARNING

• Replace the heat exchanger core if you find that the

knob of the heat exchanger core is damaged or is dete-

riorated when cleaning.

There is falling danger.

1. Remove the service cover.

Refer to the section (4-1, 1).

2. Remove the air filter.

Refer to the section (4-1, 2).

3. Take out the heat exchanger cores.

Pull out the air filter and then pull out the two heat

exchanger cores. (Refer to figure 4)

4. Use a vacuum cleaner to remove dust and foreign objects

on the surface of the heat exchanger core.

(Refer to figure 7)

• Use the vacuum cleaner equipped with a brush on the

tip of the suction nozzle.

• Lightly contact the brush on the surface of the heat

exchanger core when cleaning.

(Do not crush the heat exchanger core while clean-

ing.)

CAUTION (During Operation)

• Do not clean touching strongly with a vacuum cleaner. This

may crush the mesh of the heat exchanger core.

• Never wash the heat exchanger core with water.

• Have your dealer professionally clean the filter if it is very

dirty.

5. Put the heat exchanger core on the rail and insert it

securely in place.

6. Install the air filter securely in place.

(Refer to the section (4-1, 4))

7. Install the service cover securely in place.

(Refer to the section (4-1, 5))

CAUTION

• Always use the air filter.

If the air filter is not used, the heat exchanger core will be

clogged, possibly causing poor performance and subse-

quent failure.

4-4 INSPECTION OF THE FAN MOTER

NOTE

• When the fan motor fails, the remote controller does not dis-

play any error code.

Usage under that status will lead to insufficient ventilation.

The air supply and exhaust fans should be checked once

every one or two months.

You can make a simple check such as below way.

To check the airflow, hold a bar of which the end has a string

or other similar lightweight item over the supply grille and

exhaust grille.

5. TROUBLE SHOOTING

5-1 THE FOLLOWING SITUATIONS ARE NOT

MALFUNCTIONS

• The unit does not start running.

The icon “ ” is displayed on the remote controller and

pressing the on/off button causes the display to blink for a

few seconds.

<Cause>

This indicates that the centralized device controls the unit.

The blinking display indicates that the remote controller can-

not be used.

The fans start running after 1 minute when pressing On/Off

button.

<Cause>

This indicates that the operation is in preparation.

Wait for about 1 minute.

• The unit stops sometimes.

“U5” is displayed on the remote controller and the operation

stops but then restarts after a few minutes.

<Cause>

This indicates that the remote controller is intercepting noise

from electrical appliances other than the ERV unit, and this

prevents communication between the units, causing them to

stop.

Operation automatically restarts when the noise goes away.

5-2 IF ONE OF THE FOLLOWING MALFUNCTIONS

OCCURS, TAKE THE MEASURES SHOWN

BELOW AND CONTACT YOUR DAIKIN DEALER

The system must be repaired by a qualified service person.

DO NOT CHECK AND REPAIR OPENING INSIDE THE UNIT

BY YOURSELF.

WARNING

When the ERV is in abnormal conditions (smell of

something burning, etc), cut off the power, and contact

your dealer.

Continued operation under such circumstances may result

in a failure, electric shock and fire.

• The unit does not operate at all.

a. Check if there is a power failure.

Measure: After power has been restored, start opera-

tion again.

b. Check if the fuse has blown.

Measure: Turn the power off and contact your dealer.

c. Check if breaker has worked.

Measure:

Turn the power on with the

breaker switch in the off

position.

Do not turn the power on

with the breaker switch in

the trip position.

(Contact your dealer.)

CENTRAL

CONTROL

Breaker

(ground fault circuit interrupter)

OFF

Switch

Trip position

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Daikin VAM-GVJU Specifications Page 48

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