Cor HRVCRSVU1157 설치 지침 매뉴얼 - 페이지 15

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If the integrated control LED of the unit is flashing, this means the unit sensors detected a problem. See the table below to know where the

problem occurs on the unit.

LED flashes GREEN

LED flashes AMBER

LED flashes RED

Problems

Unit does not work.

The damper actuator does not

work.

The wall control does not work.

The Dehumidistat (or Humidity

control) does not work OR the

20- minute push button timer

does not work OR its indicator

light does not stay on.

The supply and/or exhaust motor

do not work.

The defrost cycle does not work

(the fresh air duct is frozen) OR

the fresh air distributed is very

cold.

The integrated control push but-

ton does not work.

ERROR TYPE

Thermistor error

Replace thermistor

Damper error

Go to point 6

Motor error

Go to point 9

Possible causes

The circuit board may be defective.

The fuse may be defective.

The damper actuator or the integrated

damper mechanism may be defective.

The circuit board or the transformer

may be defective.

The wires may be in reverse position.

The wires may be broken.

The wire in the wall OR the wall con-

trol may be defective.

The wires may be in reverse position.

The Dehumidistat (or Humidity con-

trol) or push button may be defective.

The fuse may be defective.

The jumper JU1 may be in wrong po-

sition or missing.

Jumper J11 may be missing.

The circuit board or transformer may

be detective.

The motor(s) or capacitor(s) may be

defective

Ice deposits may be hindering the

damper operation.

The damper rod or the port damper

itself may be broken.

The damper actuator or circuit board

may be defective.

The 30- second boot sequence is not

completed.

ACTION

Unit works but will defrost frequently

Unit does not work

You should try this

Unplug the unit. Disconnect the main control and the op-

tional(s) controls(s) (if need be). Jump G and B terminals.

Plug the unit back and wait about 10 seconds. If the motors

run on high speed and the damper opens, the circuit board

is not defective.

Check if fuse F1 is blown. In that case, replace fuse F1 as

per product nameplate.

Unplug the unit. Disconnect the main control and the op-

tional controls(s) (if need be). Wait 10 seconds and plug

the unit back. Check if the damper opens. If not, use a

multimeter and check for 24 V AC on J12- 1 and J12- 2 (in

electrical compartment). If there is 24 VAC, replace the en-

tire damper assembly.

NOTE: It is normal to experience a small delay (7- 8

seconds) before detecting the 24 V AC signal at start- up.

This signal will stay during 17- 18 seconds before disap-

pearing.

If there is no 24 V AC, check for 24V AC between J8- 1 and

J8- 2. If there is 24V AC, replace the circuit board, and if

there is no 24V AC, change the transformer.

Ensure that the color coded wires have been connected to

their appropriate places.

Inspect every wire and replace any that are damaged.

Remove the wall control and test it right beside the unit

using another shorter wire. If the wall control works there,

change the wire. If it does not, change the wall control.

Ensure that the color coded wires have been connected to

their appropriate places.

Jump the OL and OC terminals. If the unit switch to high

speed, remove the Dehumidistat or push button and test it

right beside the unit using another shorter wire. If it works

here, change the wire. If it doesn't, change the Dehumidis-

tat or the push button.

Check if fuse F1 is blown. In that case, replace fuse F1 as

per product nameplate.

Make sure that jumper is properly located as per wiring

diagram on page 12.

Make sure there is a jumper on connector J11.

NOTE: Refer to the FAN MOTOR SPEED SELECTION table

of the wiring diagram on page 12 to know what the voltage

reading must be. Press on the integrated control push but-

ton until the unit turn on low speed (the LED will light AM-

BER). Using a multimeter, check the voltage on J4- 1 and

J4- 2 (for supply motor), and on J5- 1 and J5- 2 (for ex-

haust motor). Then set the unit on high speed by pressing

on the integrated control push button one more time (the

LED will light GREEN). Using a multimeter, check the

voltage on J4- 1 and J4- 2 (for supply motor), and on

J5- 1 and J5- 2 (for exhaust motor). If all the readings cor-

respond to the right voltage values, the circuit board is not

defective. If one or both readings are different, change the

transformer. If no voltage is present, change the circuit

board.

Using a multimeter, check the ohms value on each motor

connectors. For BLUE and BLACK motor wires, the right

value is  49 ohms. For BLUE and BROWN motor wires, the

right value is  79 ohms. For BROWN and BLACK motor

wires, the right value is  126 ohms. If the ohms values are

the same, the motor is not defective. Replace the motor

capacitor.

Remove the ice.

Inspect these parts and replace if necessary.

See point 2.

See Unit Booting Sequence, page 9.

UNIT STATUS