
13
© 2015 Heatcraft Refrigeration Products, LLC
CURRENT STATE OF THE CIRCUIT (cont.)
ACTUAL DISPLAY
Ҋ
p
n
p
n
p
n
p
DESCRIPTION
9. The safeties (Comp no Stop, Phase Loss, Emergency Stop, High Sump Water
Temperature) are checked once every second. (All of the safeties are options
features). Once a safety has occurred the user is required to correct the problem
and reset the unit using the ‘Lckout RST’ from the Menu on the MAGNUM’s key
pad.
10. If the compressor relay output is turned on, either by computer or manual, the
compressor safeties are checked once every second. The following compressor
safeties are supported:
a.
Low & Unsafe Suction Pressure
b.
Low & Unsafe Differential Oil Pressure
c.
Low & High Discharge Pressure
d.
High Discharge, Oil and Motor Temperatures
e.
Low & High Motor Ampere
f.
No Compressor Proof
g.
Freeze protection for split barrels units
Ҋ
p
n
p
n
p
n
p