Graco 259079 Operation Manuals page 75

Error Error Type
Code Location
A4CM MCM ALARM
A4DA Boost A ALARM
A4DB Boost B
A4DH Hose
A4NM MCM ALARM
A7CH Hose ALARM
Boost A
A7DA ALARM
A7DB Boost B
A7DH Hose
A8DA Boost A ALARM
A8DB Boost B
A8DH Hose
3A1705E
Name Cause
High MCM MCM is drawing too
Current much current from the
system.
High Heater Short circuit in booster
Current heater wiring.
Bad heater.
Short circuit in hose
wiring.
High Motor Short circuit of motor
Current wiring.
Motor will not rotate.
Chemical pump is stuck
Unexpected Shorted Temperature
Relay Current Control Module.
Unexpected Shorted Temperature
Heater Current Control Module.
No Heater Tripped circuit breaker.
Current
Loose/broken
connection.
Troubleshooting
Solution
If problem continues
replace MCM. See System
Repair manual.
Check wiring for touching
wires.
Measure resistance of
heater(s), replace if
needed.
Check continuity of
transformer windings,
normal reading are about
0.2Ω on both primary and
secondary. If reading is 0Ω
replace transformer.
Check for shorts between
the primary winding and
the support frame of the
transformer.
Check wiring to the motor
to ensure no bare wires are
touching and that no wires
are shorted to ground.
Replace motor. See
System Repair manual.
Repair or replace chemical
pump. See System Repair
manual.
Replace Module. See
System Repair manual.
Replace Module. See
System Repair manual.
Visually check circuit
breaker for a tripped
condition.
Check heater wiring for
loose wires.
75