GIRBAU RMS628 Maintenance Manual

SAT – Electric Maintenance 6
Cod. 522664en
Rev. 02/0316
1.- COMMUNICATION FAILURE BETWEEN THE MICROPROCESSOR AND THE INVERTER
Alarm codes:
IC control microprocessor display report: 2 Inverter communication failure.
LC/CC control microprocessor display report: Alm VAR 0
Inverter display report: The communication failure can appear with various codes. In an inverter power failure
(insufficient voltage), LU (low voltage) appears on the inverter display for a few seconds. This situation leads to
the appearance of the communication failure alarm.
Description
The alarm is activated if the communication between the washing machine microprocessor and the motor
control inverter is interrupted at the beginning or during the washing cycle.
Microprocessor response when an alarm is detected
It prevents or interrupts the running of the washing cycle.
It switches on the acoustic warning.
Remarks
Checking of the inverter communication circuit must be done during the INVERTER CONNECTION (IC Control)
or VAR (LC/CC Control) phase of the TEST program.
The correct inverter supply voltage is the washing machine’s supply voltage.
Tolerance: ±10%.
WARNING!! RISK OF TRAPPING OR ELECTRIC SHOCK
step
check
action
1
Activate the INVERTER CONNECTION (IC
Control) or VAR (LC/CC Control) stage of the
TEST program.
Correct voltage at inverter power supply terminals
L1, L2, and L3.
NO
Go to step 5.
YES
Go to step 2.
2
Voltage of 50mV DC. between terminals X10-
1/X10-2 of microprocessor A1 (on HS-6023/EH055
and HS-6024/EH060 LC/CC machine between
terminals X7-2/X7-3).
Fluctuations at intervals of not more than 5
seconds regularly appear on this voltage.
NO
Possible microprocessor failure. Renew
microprocessor A1.
YES
Go to step 3.
3
Voltage of 50mV DC between terminals DX+/A and
DX-/B in the inverter communication circuit.
Fluctuations at intervals of not more than 5
seconds regularly appear on this voltage.
NO
Check the connection between boards A1
and A2: cable, connections, terminals, etc.
YES
Go to step 4.
4
Continuity at inductance ends (L1).
NO
Possible inductance fault.
Renew the inductance (L1).
YES
Possible inverter failure.
Replace the inverter (A2).
5
EMI (Z1) filter supply voltage correct.
NO
Go to step 6.
YES
Possible filter failure.
Replace filter (Z1) (Note 1 next page).
6
Contactor KA1 output voltage correct.
NO
Go to step 7.
YES
Fuses F6/7/8 may be blown (only machines
with electrical heating).
Check the wiring between contactor KA1 and
the fuses.
Solve the problem.
7
Inverter relay connection.
NO
Go to step 8.
YES
Check the wiring between power supply input
and relay connection KA1.
Solve the problem.

GIRBAU RMS628 Specifications

General

Brand	GIRBAU
Model	RMS628
Category	Washer
Language	English