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This document is stored and maintained electronically by
Service. All printed copies are deemed uncontrolled.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
OPERATIONAL SEQUENCES
System Start-Up and Standby Mode
Power to controller
Is there a stored Fault
Code?
Green LED
– Off
Red LED
– Display stored
Fault Code for 27 seconds
System Start-Up
for 3 seconds
Green LED
– Rapid flash
A
Mechanical thermostat
contacts close
YES
FIRMWARE: V5.8
Main relay energised
B
Fault 9 has occurred
3 consecutive times?
C
YES
Tank
sensor < 50ºC?
Evaporator sensor
< 4ºC or > 45ºC?
YES
YES
F
NO
Standby Mode
Green LED
– On solid
NO
At least 45 minutes
since the compressor
last ran?
Fault detected?
D
NO
Green LED
– Off
Red LED
– 9 flashes
NO
NO
At least 15 minutes
since the circulator
last ran?
YES
Evaporator sensor
< 1ºC for more than
15 minutes?
YES
Circulator on
Circ. Speed: Maximum
Green LED
– 4 flashes
YES
NO
NO
Faults 1, 5 or 6
detected?
Circulator has been
on for 30 seconds?
YES
Circulator off
Green LED
– Off
D
Circulator off
Green LED
– On solid
NO
NO
NO
E
Reset button pressed
during Standby Mode
B
NOTES
1. The reset button will reset the
Fault 9 counter and clear any
stored Fault Code from the
controller memory.
2. The reset button does not
function during System Start-Up
or the Last Fault Code display
function.
YES
G
Green LED
– Off
YES
