Graco Therm-O-Flow 200 Instructions - Parts Manual page 56

Troubleshooting
Error Location Type
A1__ AMZ Alarm
A2__ AMZ Advisory
A3__ AMZ Alarm
A4__ AMZ Alarm
A7__ AMZ Alarm
A8__ AMZ Alarm
56
Error Name Error Description
Low Current Heater current is below
U_Z_ the minimum allowed
value
Low Current Heater current is below
U_Z_ the minimum allowed
value
High Current Heater current
U_Z_ exceeds maximum
allowed value
High Current Heater current
U_Z_ exceeds maximum
allowed value
Unexpected Heat current has an
Current U_Z_ unexpected current
flow
No Current Power is not getting to
U_Z_ heating element
Cause
Fault heater Check heater resistance
element and resistance to
ground. Replace faulty
heater
Fault heater Check heater resistance
element and resistance to
ground. Replace faulty
heater
Heater element Replace heater element
is defective
Heater element Check wiring to the
is shorted heater element to ensure
no bare wires are
touching and that no
wires are shorted to
ground
Heater element Replace heater element
is defective
Heater element Check wiring to the
is shorted heater element to ensure
no bare wires are
touching and that no
wires are shorted to
ground
Unexpected Fault heater element.
Current flow to Check heater resistance
the heat and resistance to
element ground. Replace heater
element
Faulty AMZ, Replace
AMZ
Power not Check fuse on the AMZ
getting to that the error element is
heating connected to
element
Check that electrical
connector on the heated
hose is plugged into the
AMZ
Check continuity of pins
on electrical connector at
AMZ end of heated
element. See heated
element manual for
impedance
measurements and pin
outs. Replace hose if
readings are to high
Solution
3A8005A