Conair W1-1.5 User Manual page 78

A
LARM
C
ONDITIONS
'
CONT D
Alarm
ALM 07
High Temperature
Safety alarm
6-14
T
ROUBLESHOOTING
Possible cause
The hot gas bypass valve
is not working properly
(possibly stuck open)
The high deviation tem-
perature is set too close to
the setpoint temperature.
Process fluid is not flow-
ing between the supply
outlet and return outlet.
The compressor is not
running.
Failed RTD or
Temperature Transmitter.
Series 1 Portable Chillers, PLC Control
Solution
Shut isolation valve to the Hot
Gas Bypass solenoid. If the To
Process temperature starts to
go down, the solenoid valve is
faulty. Have a certified refrig-
eration technician replace the
solenoid valve.
Large swings in process load
or temperature may cause this
to happen. Check the settings
for the high deviation; reset.
See Changing High Deviation,
in the Operation section.
Check for plugged pipes,
closed valves, or failed flow
switch.
Check to see if Compressor
light is lit on the control. If it
is not, check compressor over-
load in compressor terminal
box. Check power to compres-
sor and power to compressor
contactor.
See Checking the Temperature
Transmitter and RTD in the
Troubleshooting section.
UGH017/0500