Honeywell SmartVFD HVAC MR4 User Manual page 159

Honeywell
• 87
3.7 HVAC Application - Fault tracing
When an unusual operating condition is detected by the drive control diagnostics, the drive ini-
tiates a notification visible, for example, on the keypad. The keypad will show the code, the
name and a short description of the fault or alarm.
The notifications vary in consequence and required action. Faults make the drive stop and re-
quire reset of the drive. Alarms inform of unusual operating conditions but the drive will continue
running. Infos may require resetting but do not affect the functioning of the drive.
For some faults you can program different responses in the application. See parameter group
Protections.
The fault can be reset with the Reset button on the control keypad or via the I/O terminal. The
faults are stored in the Fault history menu which can be browsed. The different fault codes you
will find in the table below.
NOTE: When contacting distributor or factory because of a fault condition, always write down
all texts and codes on the keypad display.
3.7.1 Fault appears
When a fault appears and the drive stops examine the cause of fault, perform the actions ad-
vised here and reset the fault either
1. with a long (1 s) press on the Reset button on the keypad or
2. by entering the Diagnostics Menu (M4), entering Reset faults (M4.2) and selecting Reset
faults parameter.
STOP READY
Main Menu
ID: M3.1

Monitor
( 6 )

Parameters
( 13 )

Diagnostics
( 6 )
3.7.2 Fault history
In menu M4.3 Fault history you find the maximum number of 40 occurred faults. On each fault
in the memory you will also find additional information, see below.
STOP READY

Diagnostics
ID: M4.1

Active faults
( 0 )
Reset faults

Fault history
( 39 )
Keypad STOP READY
ID:

Active faults
( 0 )
Reset faults

Fault history
( 39 )
I/O STOP READY

ID:

External Fault
!
OK
Fault old

External Fault
!
Fault old

Device removed
!
Info old
Keypad
Diagnostics
M4.1
I/O
Fault history
51
891384s
51
871061s
39
862537s
HVAC A
PPLICATION
STOP READY
Reset faults
ID: M4.2
Reset faults
Help
STOP READY

Device removed
!
ID: M4.3.3.2
Code
ID
State Info old
Date 7.12.2009
Time 04:46:33
Operating time
Keypad
I/O
39
380
862537s