Tenney BTS - Page 22

TENNEY ENVIRONMENTAL
TROUBLESHOOTING GUIDE
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i
This section does not propose to be a complete and comprehensive troubleshooting guide for
the serviceman. However, it attempts to help you locate the causes of possible troubles so that
you can make simple repairs or adjustments yourself. The information here should also help
you
in localizing trouble so that you can better describe the malfunction when contacting the
Tenney Service Department. Refer to the appropriate electrical and refrigeration drawings
when using these
troubleshoot~ng suggestions.
Y
TROUBLESHOOTING GUIDE
Ii PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION il
1. Chamber Control Is Dead
2. Red OVERTEMP Light On &
Chamber Dead, Doesn't Reset
3. Conditioner Fan Dead
Circuit Breaker
1CB open
Contactor ICON failing to close
Heat Limiter Fuse has opened
Close 1 CB
Press Reset
1PB. Check Heat
Limiter
Replace
Any cause from
Problem #I
Motor shafl frozen
Defective motor
Ooen conductor at ten.
#32 or 37
--
Close securely
Verify
- measure current
Carefully check programming
Replace
Verify
- Call Tenney Service
Replace
Secure connection
4. Insufficient Heat
5. No Heat
6. Excessive Heat
PAGE
25
Do as staled
Verify
- rotate by hand carefully!
Verify
- feel for heat & measure
current
Secure termination
- --
Chamber door is ajar
One heater element is
burned out
Controller Failure
Heater elements
burned outlopen
Controller output 1 CI-01 failing to
close
Triac
ITRC failed open
Open connection between: triac
&
heater, or ten. #22 & heater
,-.
Open temperature sensor
Short circuited temperature sensor
Triac
ITRC failed in conducting
state (usual failure mode)
Replace
Replace
Replace
Controller output
ICI-01 failing to
open
Verify
- Contact Tenney Service