Press the remote controller's "CHECK" button twice consecutively to be able to run a self-check. See the chart below for content of error code displays.

LCD

Nonconformity Content

Suction sensor error

Tubing (liquid) sensor error

Drain sensor error

Drain overflow safeguard operation

Freezing/overheating safeguard operation

See the chart below for details of the LED displays (LED 1, 2, 3) on the indoor substrate.

LED 1 (microcomputer power supply)

LED 2 (remote controller feed)

LED 3 (indoor and outdoor signals)

2) Outdoor unit

1) Check Items

•

After installation of indoor and outdoor units, and piping and electric wiring

work, check that the unit is free from leaks of refrigerant, loosened connec-

tions, and incorrect polarity.

•

Check that there is no negative phase and open phase. (The F1 message for

negative phase and the F2 message for open phase will flash at LED 1 on the

outdoor substrate. If this happens, rewire correctly.)

•

Measure the impedance between power terminals (Single phase: L, N,

triple phase: L1, L2, L3, N,

) and the ground with a 500 V Megger and check

that it is 1.0 MΩ or more. Do not operate the equipment if measurement is less

than 1.0 MΩ. * Never conduct this operation on the outdoor connection wiring

terminals (S1, S2, S3) as this causes damage.

•

When there is no error at the outdoor unit.

(If there is an error at the outdoor unit, it can be evaluated at LED 1 [digital

display] of the outdoor substrate.)

•

The stop valves are open both the liquid and gas sides.

After checking the above, execute the test run in accordance with the follow-

ing.

2) Test run start and finish

•

Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

11.3. Self-check

Retrieve the error history of each unit using the remote controller.

1 Switch to the self check mode.

When the H [CHECK] button is pressed twice successively within three sec-

onds, the display shown below appears.

Self check address or self check refrigerant address

Symptoms

Outdoor Substrate LED Display

After "startup" display, "00" is dis-

played (correct operation).

After "startup" display, error code is

displayed.

After "startup" display, "F1" (negative

phase) is displayed.

After "startup" display, "00" or "EE" is

displayed ("EE" is displayed when a

test run is made).

After "startup" display, "EA" (error for

number of units) or "Eb" (unit number

error) is displayed.

After "startup" display, "00" is dis-

played (correct operation).

After "startup" display, "00" is dis-

played (correct operation).

After "startup" display, "00" is dis-

played (correct operation).

LCD

Tube temperature error

Tube (2-phase tube) sensor error

U0 ~ UP

Outdoor unit nonconformity

F1 ~ FA

Outdoor unit nonconformity

E0 ~ E5

Signal error between remote controller and

indoor unit

Displays the ON/OFF of power for control. Check that this is lit during normal use.

Displays the ON/OFF of feed to wired remote controller. Is only lit for indoor unit linked to outdoor unit with address "00".

Displays signal between indoor and outdoor units. Check that this is flashing during normal use.

• After power is turned ON, system startup lasts for about 2 mins., and

"PLEASE WAIT" is displayed (correct operation).

• Outdoor unit's safeguard installation connector is open.

• Negative phase and open phase of outdoor unit's power terminal board

(Single phase: L, N,

• Incorrect connection of outdoor terminal board (Single phase: L, N,

triple phase: L1, L2, L3, N,

• Outdoor unit and indoor unit construction differ

• Wiring for the indoor and outdoor unit is not connected correctly. (Polarity

is wrong for S1, S2, S3)

• Remote controller transmission wire short

• There is no outdoor unit for address 0 (address is something other than

0).

• Remote controller transmission wire burnout

• After cancellation of function selection, operation is not possible for about

30 secs. (correct operation).

Nonconformity Content

E6 ~ EF

•

Operation from the outdoor unit

Execute settings for test run start, finish and operation mode (cooling, heating)

using the DIP switch SW 4 on the outdoor substrate.

[Fig. 11.2.1] (P.5)

A Stop

C Operation

1 Set the operation mode (cooling, heating) using SW 4-2

2 Turn ON SW 4-1, The operation mode for SW 4-2 will be adhered to, and

the test run will commence

3 Turn OFF SW 4-1 to finish the test run

•

There may be a faint knocking noise emitted from the proximity of the fan

during the test run. This is torque fluctuation occurring due to control of fan

revolutions. There is no problem with the product.

Note:

The SW 4-2 operation mode cannot be changed during the test run. (To change

test run mode, stop the equipment with SW 4-1, change the operation mode,

then restart test run with SW 4-1.)

•

If the 2-hour timer is set, the test run will stop automatically after 2 hours.

•

During the test run, the room temperature display on the indoor unit will indi-

cate the temperature of the indoor unit piping.

2 Set the address or refrigerant address No. you want to self check.

When the F [

TEMP. (

creases and increases between 01 and 50 or 00 and 15. Set it to the address

No. or refrigerant address No. you want to self check.

Approximately three seconds after the change operation, the self check refrig-

erant address changes from flashing to a steady light and self check begins.

Cause

/triple phase: L1, L2, L3, N,

)

grounding and S1, S2, S3)

LCD

Nonconformity Content

Signal error between indoor and outdoor

units

- - - -

No error history

FFFF

No relevant unit

B Cooling

D Heating

) and (

)] buttons are pressed, the address de-

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Self-Check - Mitsubishi Electric PEH-RP250MYA Installation Manual

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11.3. Self-check

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