I A Peak Limiter Alarm Signals - Mitsubishi Electric CLIMAVENETA BRAN2 0021M Installation, User And Maintenance Manual

FAULT
Values display indication
Er61
Display indication
Er75
Display indication
Er81
Display indication
Er85
Display indication
Er90
PEAK LIMITER ALARM SIGNALS
The heat pumps can be fitted with a single-phase or three-phase peak limiter to reduce compressor start-up current.
Single-phase peak limiter
The green LED on steady indicates line voltage is present.
The red LED identifies the type of alarm, based on the
sequence of flashes. The orange LED indicates the delay
between unit starts and/or stops.
Orange LED Condition
Minimum recovery
time between starts
ON
and/or recovery time
between stop and start
Red LED Condition
Undervoltage
2 flashes
Ue < 190VAC)
Overcurren
3 flashes
(>80 A for 1 sec.)
4 flashes Protection relay
5 flashes Ramp incomplete
Green LED Condition
Flashing Power supply alarm
Device powered,
ON
no faults
* monitored during inactivity and bypass
** In this situation, the red LED flashes 4 times; the service
centre needs to be contacted to reset the device.
CAUSE
Faulty BT2 system water outlet sensor
(automatic reset)
Pressure transducer malfunction
Compressor maintenance interval
Water pump maintenance interval
Maximum alarm log size exceeded
Action
Autoreset when the
minimum recovery
time has elapsed
Action
Autoreset after
5 minutes *
Autoreset after
5 minutes
Autoreset after
5 minutes **
Autoreset after
5 minutes
Action
Contact service
centre
Awaiting
compressor
start signal
Check electrical connections
Replace component
Check electrical connection (see unit wiring dia-
grams)
Replace component
Check operating pressure
Check condition of the compressor
Reset the clock
Check condition of the water pumps
Reset the clock
Reset alarm log
Three-phase peak limiter
The three-phase peak limiter has 2 built-in indicator LEDs.
The green LED indicates line voltage is present and correct
operation. The red LED identifies different alarm conditions
based on the sequence of flashes, as shown in the enclosed
table.
Red LED Condition
2 Incorrect phase sequence Reverse the phases
Line voltage out
3
of limits
4 Frequency out of limits
Locked rotor
5
(during ramp)
Ramp starting
6
> 1 sec
7 Excess temperature
Low current
8
(during bypass)
9 Voltage unbalanced
Green LED Condition
1 minute recovery
between starts and/or
Flashing
recovery time between
stop and start
Device powered,
ON
no faults
Device powered
ON
during ramp
SOLUTION
I A
Action
Autoreset after
5 minutes
Autoreset after
5 minutes
Autoreset after
5 minutes
Autoreset after
5 minutes
Autoreset after
5 minutes
Autoreset after
5 minutes
Autoreset after
5 minutes if all the
three phases (L1, L2,
L3) are connected
Action
BRAT2 - BRAN2 EN 29