Chapter 8 – Maintenance
TestEquity 1007S Temperature Chamber
Page 8-9
Troubleshooting
SYMPTOM
CONDITION
CAUSES
Chamber completely
inoperative.
1.
Power is applied to chamber but
the controllers do not light up.
1.
Control fuse F9 open. Likely
cause is solenoid coil SV1 is
shorted.
Does not heat up at all.
1.
If F4T left PWR bar is 100%
(F4 controller light 1A is ON),
circulator fan is ON, circulator
fan is ON, the Heat light is
OFF.
2.
If controller light 1A is ON,
circulator fan is ON, the Heat
light is ON.
1.
Solid State Relay SSR1 is
defective (open).
2.
The Heat Limiter HL is open.
The Heater HT1 is open.
Heats up too slow.
1.
Does not meet published
specifications.
1.
Chamber interior is overloaded.
Circulator motor is not turning.
Port plug is not in port. Verify
that input voltage is within
tolerance and matches the input
power configuration (see
Chapter 2, Input Power
Configuration).
Heat is on all the time.
1.
If F4T left PWR bar is 0% (F4
controller light 1A is OFF)
1.
Solid State Relay SSR1 is
defective (shorted). Heater is
shorted to chassis.
Does not cool at all.
1.
If F4T left PWR bar is 100%
(F4 controller light 1B is ON,
F4T Compressor Output (F4
DigitalOut 8) is ON, the Cool
light on front panel is OFF, both
compressors are OFF.
2.
Setpoint is low than chamber
temperature but F4T
Compressor Output (F4
DigitalOut 8) is not ON.
3.
If the Cool light is ON, both
compressors are ON.
1.
Pressure switch DPS1 is
tripped.
2.
Controller is mis-configured.
Re-enter values as documented
in the controller manual.
3.
Solenoid valve SV1 may be
defective in closed position.
Pressure switch DPS1 trips.
1.
Trips immediately after turn on.
2.
Trips after operating for a
while.
1.
Low charge (leak).
2.
Ambient temperature may be
too high (over 90
°
F). Dirty
condenser, inadequate clearance
from back of chamber to the
wall.
