Danfoss VZH Series - Page 65

Application guidelines
65FRCC.PC.023.A7.22
Single compressorsTroubleshooting
Commercial Compressors
March, 2014| 3
Drive over
temperature
Ambiant temp.
Too high or fan damaged
Dirt on
CDS303 coil
Electrical cabinet
Poor ventilation
Air by-pass
Or recycled
Missing
CDS303 back side
Metal sheet
Control card
Over temp.
Safe stop
activated
Check 24V
On 12/13
terminals
24V supply to
terminal 37
Turn off power
Reset & start
Check external
controls
Check
connections
Reset & start
#29
Check alarm #
(Continue)
#65 #68
direct wire
Commercial Compressors
March, 2014| 4
DC-OV
Check main power supply
voltage
DC-UV
Main Failure
Check power
supply voltage
Turn off power
Reset & start
Reset & start
#7
Check alarm #
(Continue)
#8 #36
Too high or
too low
Power
normal
Set 14-11 to
lower value
Internal
components
damage
Contact your
Local Danfoss