Troubleshooting - TestEquity FastRate 3016C Operation And Service Manual

Troubleshooting

SYMPTOM
Chamber completely
inoperative.
Does not heat up at all.
Heats up too slow.
Heat is on all the time.
Does not cool at all.
R-404A pressure switch
HPCO trips.
R-508B pressure switch
DPS2 trips.
TestEquity 3016C Temperature Chamber
Chapter 7 – Maintenance
CONDITION
1. Power is applied to chamber but
nothing lights up.
1. If F4 controller light 1A is ON
(F4T left PWR bar is 100%),
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. Does not meet published
specifications.
1. If F4 controller light 1A is OFF
(F4T left PWR bar is 0%).
1. If F4 controller light 1B is ON
(F4T left PWR bar is 100%),
DigitalOut 8 (F4T Compressor
Output) is ON, the Cool light on
front panel is OFF, both
compressors are OFF.
2. Setpoint is low than chamber
temperature but F4 DigitalOut 8
(F4T Compressor Output) is not
ON.
3. If the Cool light is ON, both
compressors are ON.
1. Trips shortly after turn on.
2. Trips after operating for a
while.
1. If cooling from high to low
temp is reduced.
2. Trips when the cool light cycles
from on to off.
CAUSES
1. Incorrect phase sequence.
Reverse two of the input lines.
2. Control fuse F3 open. Likely
cause is shorted solenoid coil on
SV1 or SV2.
1. Solid State Relay SSR1, SSR2,
SSR13 or SSR14 are defective.
2. At least two Heat Limiters HL
are open.
1. Chamber interior is overloaded.
Port plug is not in port. Verify
that input voltage is within
tolerance. One heat limiter HL
or one heater winding is open.
1. Solid State Relay SSR1, SSR2,
SSR13 or SSR14 are defective.
Heater is shorted to chassis.
1. Pressure switch HPCO1 or
DPS2 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.
Defective R-508B expansion
valve. Refrigerant leak.
1. Ambient temperature may be
too high. Low charge (leak).
2. Dirty condenser, inadequate
clearance from back of chamber
to the wall. R-404A hot gas
bypass regulator may be
defective or set too low.
1. Low charge (leak).
2. Solenoid valve SV2 may be
defective. Hot gas bypass
regulator may be defective or
set too low.
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